Compact Watch case Opening Tool for Waterproof Watches

This pocket-sized case wrench fits threaded watch casebacks that carry perimeter notches. We build the body from polyamide PA12 and fit it with hardened steel rectangular pins. The central thumbwheel shifts the spacing across the full range from 16mm up to 52mm.

Rectangular steel pins

We harden the rectangular pins so they seat firmly inside machined caseback slots. The flat faces bear squarely against the notch walls when you turn the tool, rather than bearing on a single point.

Polyamide PA12 body

The shell is moulded from polyamide PA12 to keep the wrench light in the hand. The contoured shape gives your fingers purchase while applying downward pressure and turning the back.

Central adjuster wheel

A knurled wheel moves the pins symmetrically along the threaded internal track. You dial the spacing from 16mm out to 52mm to match the notch circle on the case.

Bench and pocket use

The compact body sits flat on the bench mat or slips into a travelling tool roll. It takes up minimal space alongside your movement holders and case vices.