▲ 40 r/WhatIsThisTool
Angle gauge is as far as I got.
The screw in the middle fits into a groove on an inner circle inside the slot in pic 3 when screwed in and depressed.
u/Oroku_saki_ — 8 days ago
The screw in the middle fits into a groove on an inner circle inside the slot in pic 3 when screwed in and depressed.