Watch Back Case Opener Tool for 40mm Screw-On Cases | Fits Berny AM138M & Similar | Non-Slip Grip Lid Remover for Wristwatch Repair

Effortlessly remove the case back of your 40mm wristwatch with this ergonomic watch case opener—designed specifically for screw-on backs like the Berny AM138M.

Whether you're a hobbyist, watchmaker, or DIY tinkerer, this tool gives you the grip and control you need to open tightly sealed backs without scratching your watch or slipping during use. The star-shaped handle allows for secure torque, while the cushioned base fits snugly over the case.

✅ Compatible with 40mm watches (adjustable with minor edits)
✅ Ideal for screw-back case watches (Berny, Seiko, Orient, Lorus, etc.)
✅ No sharp edges or metal teeth—safe on stainless steel
✅ Easy to clean and compact enough for any watch repair kit

🔩 Perfect For:
Watch repair professionals

Home battery replacements

Opening stubborn screw-case backs

Safe, non-damaging watch maintenance

📦 Ships From the USA
Includes: 1 ergonomic watch opener tool
Note: Designed for 40mm watches. Reach out for custom sizes or multi-pack options.

Designed By:Manuarmata
https://makerworld.com/en/models/918071-watch-opener-for-a-40mm-watchcase?from=search#profileId-879857