Holder for bit driver or tool with similar cylindircal end for Kupper pegboards. Fit to pegboard is tight, holder doesn't move around. Up to 16mm diameter. Stl is made for Wera 7510 torque driver which has basic 10.45mm diameter bit holder, tools with similar holders should work, if not use .f3d.
Parameters in .f3d for:
Might fit Lidl/Parkside pegboard as well, hole pattern looks pretty identical but haven't tested that.
Print right way up, tree supports for pegs.
More Kupper holders: Kupper Collection