Makita ST421D Review: The 30% Faster Stapler USA Can't Buy
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Makita TD173D Review: A Japanese DIYer’s Perspective on Japan’s Flagship Impact Driver
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Important Note for International Readers: The TD173D is a Japan-exclusive model and is not officially available in the USA or Europe through standard retail channels. This review provides insights from Japan’s market, where this tool is widely used by professionals and DIY enthusiasts.
Introduction: Why a Japanese Perspective Matters
As a DIY enthusiast based in Japan, I’ve had the privilege of using Makita tools in their home market for years. There’s something special about experiencing these tools where they’re designed, manufactured, and refined based on feedback from Japanese craftsmen who demand perfection.
Today, I’m reviewing the Makita TD173D, an 18V LXT impact driver that represents the pinnacle of Makita’s engineering in the impact driver category. Released in January 2023, this tool showcases innovations that set new standards for the entire industry.
What makes this review unique? I’m sharing insights from Japan’s market, where Makita holds legendary status among professionals. The TD173D embodies the Japanese concept of “kaizen” (continuous improvement), and after extensive use, I can confidently say this is one of the most refined impact drivers ever made.
In this review, you’ll learn:
- What makes the TD173D special in Japan’s competitive tool market
- How it compares to international models like the TD172D (XDT19)
- Real-world performance from a user perspective
- Whether it’s worth considering if you’re outside Japan
Let’s dive in.
Product Overview & Specifications
Official Model & Release Information
Model Number: TD173D (Japan market designation)
Release Date: January 2023
Classification: Professional-grade / DIY enthusiast crossover
Manufacturing: Made in Japan
Key Specifications
SpecificationMetricImperialMax Torque180 N·m133 ft-lbsNo-Load Speed0-3,600 RPM0-3,600 RPMImpact Rate0-3,800 IPM0-3,800 IPMWeight (with battery)1.5 kg3.3 lbsHead LengthCompact designUltra-slim profileChuck Size6.35mm (1/4")1/4" hex
Fastening Capacity
- Small screws: M4-M8
- Standard bolts: M5-M16
- High-strength bolts: M5-M14
- Wood screws: 22-125mm
Availability & Regional Differences
Japan Market: The TD173D is the flagship 18V LXT impact driver in Japan, released in January 2023. It’s widely available through Amazon.co.jp, Rakuten, Yodobashi Camera, and local Makita dealers.
USA/International Market: This model is not officially sold in the USA or Europe. The previous model, TD172D (known as XDT19 in the USA), remains the current offering in international markets.
Why This Matters:
- Warranty coverage is limited to Japan
- Parts and service support may be difficult to obtain outside Japan
- Import options exist through specialized retailers (Dogu Tool, ICHIBAN DEPOT, eBay), but at premium prices ($177-229 USD vs ¥18,980-20,583 in Japan)
🔋 Battery Platform Deep Dive: The Power of 18V LXT
One of Makita’s greatest strengths is their 18V LXT battery ecosystem, and the TD173D is fully integrated into this system.
What is 18V LXT?
LXT stands for “Lithium-Ion eXtreme Technology.” Launched in 2005, Makita created the world’s first 18V lithium-ion cordless tool platform. Today, it’s the largest compatible 18V slide-style battery system globally, with over 350 different tools that share the same batteries.
Battery Compatibility
The TD173D works with all Makita 18V LXT batteries, including:
- BL1815B (1.5Ah) – Compact, lightweight
- BL1830B (3.0Ah) – Balanced capacity
- BL1840B (4.0Ah) – Popular choice
- BL1850B (5.0Ah) – Extended runtime (45-minute charge time)
- BL1860B (6.0Ah) – Maximum capacity (recommended)
Important: The TD173D requires batteries with the Star Symbol™ or Yellow Battery Receiver, indicating compatibility with Makita’s Star Protection technology.
Why the Battery Ecosystem Matters
This is where Makita truly shines. Once you own one 18V LXT battery, you can power:
- Impact drivers and drills
- Circular saws and jigsaws
- Sanders and grinders
- Vacuums and blowers
- Outdoor equipment (using 18V X2 = 36V)
- Radios, fans, and work lights
From a Japanese perspective: Japanese craftsmen value efficiency and reducing equipment weight. The ability to carry 2-3 batteries and power 10+ different tools throughout the day is a game-changer.
Charging Speed
With the Makita DC18RF Rapid Optimum Charger:
- 3.0Ah battery: ~22 minutes
- 5.0Ah battery: ~45 minutes
- 6.0Ah battery: ~55 minutes
The charger communicates with the battery via built-in CPU, monitoring temperature and optimizing charge cycles for maximum battery lifespan.
Key Features & Japanese Quality
1. Revolutionary Ring LED Light (2.5X Brighter)
The TD173D features Japan’s first 360-degree ring LED illumination on an impact driver. According to Makita’s December 2022 research, this provides 2.5 times more brightness than previous 18V models.
Why this matters: Traditional dual-LED setups create shadows depending on your angle. The ring light eliminates shadows entirely, providing consistent illumination regardless of how you hold the tool. After using it, going back to standard LEDs feels like a downgrade.
The light has three brightness levels (high/medium/low) and can function as a standalone work light for approximately one hour.
2. Optimal Balance Design
Makita repositioned the battery further back compared to the TD172D, moving the center of gravity closer to your grip. This might seem like a minor detail, but it makes a significant difference during extended use.
Real-world impact: When driving overhead screws or working at awkward angles, the improved balance reduces wrist strain. Japanese carpenters, who often work 10-12 hour days, specifically praised this feature.
3. Slim All-Around Head
The TD173D eliminates the protruding LED housings found on previous models, creating a truly slim profile around the entire head circumference. This improves access in tight corners and confined spaces.
Measured difference: The TD173D can work in spaces where the TD172D simply won’t fit, particularly in cabinet installation and electrical work.
4. Rear-Mounted Control Panel
The mode selection panel has moved to the rear of the tool, behind the battery. This allows you to check and change modes without stopping work or repositioning your grip.
Four modes available:
- Wood mode (softer impact for finish work)
- Bolt mode (maximum power)
- Tightening mode (controlled torque)
- Custom mode (programmable – press two buttons to save your preferred setting)
5. Brushless Motor Technology
Like all modern Makita professional tools, the TD173D uses a brushless motor. Benefits include:
- 50% longer runtime vs. brushed motors
- Cooler operation (no friction from carbon brushes)
- Extended tool lifespan
- More power in a smaller package
6. Precision Engineering
Japan’s manufacturing standards are evident in the details:
- Minimal bit wobble: Dual ball bearings and ribbed bit sleeve
- 10.5° tilt angle performance: Excellent corner striking capability
- Reduced cam-out: Better screw engagement, fewer stripped heads
Real-World Use Cases
My Experience Using the TD173D
Over the past months, I’ve used the TD173D for various projects:
1. Deck Construction: Drove hundreds of 125mm (5-inch) deck screws into pressure-treated lumber. The TD173D handled this without hesitation, and the ring LED was invaluable for early morning work.
2. Cabinet Installation: The slim head design made a noticeable difference when working inside cabinet frames. Previous models would bump into adjacent surfaces; the TD173D navigated these spaces easily.
3. Fence Repair: Installed lag bolts (M10 x 100mm) into existing posts. The bolt mode delivered consistent torque, and the improved balance reduced arm fatigue.
4. Furniture Assembly: The wood mode with adjustable speed prevented over-driving screws in softer materials like pine and plywood.
Professional Applications
Japanese contractors use the TD173D for:
- Residential framing and renovation
- Commercial interior finish work
- Electrical and plumbing installations
- Steel frame assembly (with appropriate bits)
DIY Applications
Perfect for home projects:
- Building outdoor structures (decks, pergolas, sheds)
- Installing shelving and storage systems
- Home renovation and remodeling
- Furniture building and repairs
Pros & Cons: An Honest Assessment
Pros
✅ Exceptional Build Quality: Made in Japan with precision manufacturing standards that are immediately apparent when you hold it.
✅ Best-in-Class Ergonomics: The rear battery placement and slim head create perfect balance.
✅ Ring LED Innovation: The 360-degree lighting truly eliminates shadows and improves visibility.
✅ Massive Battery Ecosystem: 350+ compatible tools mean your investment pays dividends across your entire toolkit.
✅ Four Customizable Modes: Flexibility for different materials and applications.
✅ Durability: Japanese professionals trust Makita for years of daily use.
Cons
❌ Japan-Exclusive Model: Not officially available in USA/Europe, limiting accessibility for international buyers.
❌ No Warranty Outside Japan: If you import this tool, you won’t have warranty coverage or easy access to service.
❌ Premium Pricing: At ¥18,980-20,583 (body only) in Japan, it’s not cheap. Import prices ($177-229 USD) are even higher.
❌ Weight: At 1.5kg (3.3 lbs) with battery, it’s not the lightest option (though the balance compensates).
❌ Overkill for Casual Users: If you only drive screws occasionally, simpler models offer better value.
Japanese Market vs. International Market Differences
In Japan, the TD173D represents the natural evolution of Makita’s impact driver lineup. Japanese users expect continuous improvement, and Makita delivers.
For international markets, Makita has taken a more conservative approach, keeping the TD172D (XDT19) as the flagship model. This may reflect different market priorities or supply chain considerations.
Competitive Comparison
Within the Makita Lineup
TD173D vs. TD172D (XDT19):
- TD173D has ring LED vs. dual LED
- TD173D has slimmer all-around head
- TD173D has rear-mounted controls
- Both share same torque (180 N·m) and speed specs
- Verdict: TD173D is a refinement, not a revolution
TD173D vs. TD001G (40V XGT):
- TD001G offers more power (220 N·m torque)
- TD001G uses newer 40V XGT battery platform
- TD173D is more compact and lighter
- Verdict: Choose XGT for maximum power; choose TD173D for everyday versatility
vs. DeWalt DCF850/DCF887
DeWalt’s Atomic (DCF850) and standard 20V Max (DCF887) are popular in USA markets.
Advantages of TD173D:
- Superior build quality and durability
- Better ergonomics and balance
- Larger battery ecosystem (350 vs. ~200 tools)
Advantages of DeWalt:
- Wider USA availability and support
- Competitive pricing
- PowerStack battery technology
vs. Milwaukee M18 Fuel 2953
Milwaukee is the current favorite among USA professionals.
Advantages of TD173D:
- Lighter and more compact
- Ring LED vs. tri-LED
- Japanese precision manufacturing
Advantages of Milwaukee 2953:
- Higher torque (220 ft-lbs peak)
- Excellent USA market support
- Strong brand following in North America
vs. Bosch GDX18V-200
Bosch offers excellent German engineering.
Advantages of TD173D:
- Better battery ecosystem
- Ring LED lighting
- Slimmer head design
Advantages of Bosch:
- Lower vibration levels
- Competitive European pricing
- Good availability in Europe
Why Choose Makita? (Japanese Quality Perspective)
In Japan, Makita represents monozukuri (the art of making things). This philosophy emphasizes:
- Attention to detail
- Long-term durability over short-term savings
- Continuous improvement based on user feedback
- Pride in craftsmanship
Japanese professionals choose Makita not just for performance, but for the confidence that their tools will work reliably for years.
Who Should Buy the TD173D?
Ideal Users
✅ You’re Based in Japan: If you have easy access to purchase and service, this is an excellent choice.
✅ Serious Makita Collectors: Tool enthusiasts who want Japan-exclusive models.
✅ Professional Users in Japan: Contractors who need reliable, professional-grade performance daily.
✅ DIY Enthusiasts Building 18V LXT Collection: If you’re already invested in Makita’s ecosystem, the TD173D is the flagship experience.
Consider Alternatives If…
❌ You’re in USA/Europe and Want Full Support: The TD172D (XDT19) offers similar performance with official warranty and service.
❌ You’re on a Tight Budget: Plenty of capable impact drivers cost less.
❌ You’re Not in Makita’s Ecosystem: Starting from scratch? Consider which brand has better local support in your area.
❌ You Need Maximum Power: The 40V XGT models (TD001G) deliver more torque.
Where to Buy (Important Considerations)
🇯🇵 Japan (Official Availability)
- Amazon.co.jp: ¥18,980-20,583 (body only)
- Rakuten: Similar pricing with point rewards
- Yodobashi Camera: Physical stores and online
- Local Makita dealers: Full range of kit options
- Price for full kit: ¥42,270-48,070 (with 2x BL1860B batteries + DC18RF charger + case)
🇺🇸 USA (Import Only – Not Officially Available)
⚠️ Important: The TD173D is not sold through official Makita USA channels (Home Depot, Lowe’s, Acme Tools).
Import Options:
- Dogu Tool: Specialized Makita importer
- ICHIBAN DEPOT: Japan tool imports
- eBay: Direct from Japan sellers
- Price: $177-229 USD (body only, import pricing)
Considerations for USA Buyers:
- ❌ No Makita USA warranty coverage
- ❌ Limited or no service/repair support
- ❌ Higher prices due to import costs and shipping
- ✅ Compatible with USA-market 18V LXT batteries (BL1860B, etc.)
- ✅ Chargers work with voltage adapters (100-240V)
🇬🇧 UK/Europe (Very Limited Availability)
Similar to USA – import only through specialized retailers or eBay.
💡 Alternative for International Buyers
If you’re outside Japan, consider the TD172D (XDT19 in USA), which offers:
- 95% of the TD173D’s performance
- Official warranty and support in your region
- Wide availability
- Competitive pricing
USA Pricing (TD172D/XDT19):
- Body only: ~$129
- Kit with batteries and charger: ~$249-299
Final Thoughts from Japan
After extensive use, I can say the TD173D lives up to Makita’s reputation for quality and innovation. The ring LED alone is worth experiencing – it genuinely transforms how you work in dim conditions. The improved balance and slim head design show that Makita listened to professional feedback and delivered meaningful improvements.
Is it perfect? No tool is. It’s heavier than some competitors, and the price premium is real.
Is it worth it? In Japan, absolutely. The build quality, durability, and integration with the 18V LXT ecosystem make it an excellent long-term investment.
A Note on Availability
As a Japanese DIYer, I have the advantage of easy access to the TD173D. However, I understand that for my international readers, obtaining this tool requires more effort and investment.
My Recommendation:
If you’re in Japan: The TD173D is an excellent choice and worth the upgrade from TD172D. The refinements are meaningful, especially if you use impact drivers frequently.
If you’re in the USA/Europe: Unless you’re a serious Makita collector or absolutely need the specific features of the TD173D (ring LED, slimmer head), the officially available TD172D (XDT19) is a more practical choice with full warranty and support. You’ll get 95% of the performance without the import hassle.
For serious tool enthusiasts: If you value Japanese manufacturing and want to experience Makita’s latest innovations, importing the TD173D can be worthwhile – just understand the trade-offs regarding warranty and support.
The TD173D represents the pinnacle of what Makita offers in the 18V LXT impact driver category. It’s a tool designed for professionals but accessible to serious DIY enthusiasts. Whether it’s the right choice for you depends on your location, budget, and how much you value the cutting-edge features Makita developed for Japan’s demanding market.
Final Rating: ★★★★★ (5/5) for users in Japan
Final Rating: ★★★☆☆ (3/5) for international users due to availability concerns
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ABOUT ME
Hi, I’m Aki, a Japanese DIY enthusiast who loves building, repairing, and improving things with Makita tools.
Living in a small house in Japan taught me how to be creative with limited space and tools.
On this blog, I share honest reviews, simple project ideas, and the Japanese way of enjoying DIY life.
