This is a small screwdriver handle made to hold 1/4' screwdriver bits. There is no mechanism to hold the bit, just friction, so there are three sizes. 6.35mm equals 1/4" but your bits may be slightly different. The only difference between the files is the ID of the hex.
Stubby_Screwdriver_6.3.STL |
Stubby_Screwdriver_6.4.STL |
Stubby_Screwdriver_6.5.STL |