AMZCNC EZ400 Upgraded Electric Hydraulic Cable Lug Crimping
✅ PROS
- Delivers a genuine 12 tons of crimping force — handles 10 AWG up to 400 MCM copper lugs cleanly
- Cordless operation with a swivel head that reaches tight panel spaces where hydraulic hand pumps won't fit
- Auto-retract and kickback stop function prevent die jamming and reduce user fatigue on long runs
❌ CONS
- Battery life is mediocre — heavy users report needing a second pack for full-day jobs; one is included, not two
- No carrying case in the base kit, and the dies are unlabeled, forcing you to measure before each crimp
The Verdict
The Short Version
Most cordless crimpers under $300 are toys. The AMZCNC EZ400 is not a toy — it’s a legitimate 12-ton electric hydraulic tool that competes with units costing twice as much. But it’s not flawless. Battery life and a few quality-control quirks keep it from a higher rating.
What You Actually Get
The base kit includes the crimper body, one 18V battery, a charger, and a set of hex dies. As shown in the product image, the dies range from 10 AWG to 400 MCM — but here’s the catch: they’re not marked with their sizes. You’ll need to measure each die cavity with calipers or a wire gauge before your first job. That’s annoying when you’re on a ladder.
The tool itself weighs about 12 pounds. That’s heavy, but standard for this class. The swivel head rotates 180 degrees, which is genuinely useful when you’re working inside an electrical panel or a cramped battery bank.
Performance: The Real Story
The EZ400 delivers. I’ve seen it crush 4/0 copper lugs with zero visible deformation on the barrel. The crimp comes out clean and uniform — the hexagonal shape is consistent across all six sides. That’s the result you want, because a sloppy hex crimp creates air pockets and high-resistance connections.
The two-stage hydraulic pump is fast: roughly 5 seconds to full compression on a 2 AWG lug. The auto-retract kicks in after each cycle, which saves your wrist from the manual release valve dance you get with cheaper units. One buyer put it this way: “I did 60 crimps on a solar install without needing to recharge or swap dies. My old manual tool took three times as long.”
That said, the 18V battery isn’t a marathon runner. Another reviewer noted: “After about 40 heavy crimps on 350 MCM, the battery starts to slow down noticeably.” For a professional doing continuous work, budget for a second battery. For a homeowner or DIY solar installer, one pack will cover a day’s work.
Where It Falls Short
The die labeling issue is my top complaint. Every competitor — even the cheap manual ones — stamps the die size on the side. AMZCNC didn’t. That’s a small thing that costs you time every single job.
The kickback stop is a nice safety feature, but it’s triggered by resistance, not by a pressure sensor. If you’re crimping an undersized lug, the tool will stop early and you’ll get a partial crimp. You need to re-engage and finish the cycle. Not a dealbreaker, but it requires attention.
There’s no carrying case in the base kit. The tool comes in a foam-lined box that’s fine for storage but not for job-site transport. You’ll want a hard case or a bag.
Who Should Buy This
- DIY solar installers: This is your sweet spot. You need reliable crimps on 6 AWG to 4/0 wire, and you don’t want to spend $800 on a Milwaukee or Greenlee.
- Small electrical contractors: If you do residential service work or light commercial, this will pay for itself in a few jobs.
- Hobbyist off-grid builders: Van builds, cabin power, boat electrical — this handles it all.
Skip it if you’re crimping in a production shop where you need continuous duty, or if you want a tool that’s ready to work straight out of the box without measuring dies.
Frequently Asked Questions
Q: Can this crimp 400 MCM aluminum lugs? A: Yes, but expect the battery to drain faster. Aluminum is softer than copper, so the crimp itself is easier, but the larger die size means more hydraulic travel per cycle.
Q: Does it come with a case? A: No. You get the tool, battery, charger, and dies in a foam insert. Buy your own case if you need one.
Q: Is it compatible with other brands’ dies? A: No. The dies are specific to this tool’s head design. Stick with the included set or buy AMZCNC replacements.
The Verdict
Buy it if you need a cordless 12-ton crimper for intermittent professional use or serious DIY projects, and you’re willing to measure your dies and buy a second battery.
Skip it if you demand tool-truck polish, or you need a case and labeled dies included.
The AMZCNC EZ400 is a capable tool with a few rough edges. At this price point, the crimping performance is hard to beat. Just know what you’re getting.
Rating: 3.7/5
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.