This is intended to friction fit on the end of an LTT stubby screw driver.
This allows you to slip the screw-driver in your pocket without having to worry about the bit in the screw-driver poking a hole in your pants.
It's designed for resin printing, and to fit snugly on the driver.
It can probably work fine with normal FDM printing too, however may be a bit too snug.
I did notice that after a bit of aging of the resin, it fit TOO snugly as the resin shrank slightly, but by locking the ratchet, and working the protector on the screw-driver, the knurling “sanded” the protector to a great fit.
Do be careful, as this can fit snugly enough to pull the driver apart. If it fits too snugly, scaling the print file a bit should help.
The author marked this model as their own original creation.