JUMBO or EXTRA LARGE Watch case remover/opener for screw on case backs repairs

A jumbo-sized case back opener purpose-built for oversized watches, fitted with 12 interchangeable pins so it can grip a wide range of screw-on case back groove patterns.

⭐ At a glance

📏 Extra-large / jumbo size, made for bigger modern watch cases that standard openers can't handle

✅ Suitable for most screw-on case backs thanks to the 12 supplied pins

📦 Includes: opener tool, 12 pins and a small steel ruler for measuring groove spacing

✔️ Condition: New with tags

Brand: Unbranded

🔧 What it does & how to use

This tool removes screw-on case backs from watches, and this jumbo version is scaled up to cope with the increasing number of very large watches on the market. It's useful for both hobbyist watch repairers and professionals who work on oversized cases where a standard-size pin opener won't reach or grip properly.

• Measure the grooves: use the supplied steel ruler to measure the distance between the notches on the case back.
• Fit the matching pins: select and insert two pins into the opener body that correspond to the measured spacing.
• Locate the grooves: position the pins into the notches on the case back.
• Turn to remove: rotate the tool anticlockwise to unscrew the back (clockwise to refit once repairs are complete).

⚠️ Please check this is the jumbo/extra-large version, so confirm your watch case is oversized before buying — standard-size watches are better suited to a regular case opener. Note also that packaging may vary; the tool supplied will be as described.