Ever wanted to open up your screwed down caseback to poke around? This is exactly the tool you'll need to open and close screwed down casebacks that have notches (see picture for example).
This tool is made of brass, and has hefty steel tips. The tip diameter is adjustable and will work with most notched casebacks.
Please be careful when opening casebacks. We assume no responsibility for any damage or scratches incurred.