Plug spinners are used when you pick a lock in the wrong direction and need to move the plug to the other side of the shear line without picking it again. Simply wind up the spinner, insert the tip in the keyway and release the lever. The plug will spin to the other side of the shear line.
PLEASE BE AWARE, THE QUALITY OF THIS ITEM IS LIMITED. THIS PLUG SPINNER WAS NOT DESIGNED FOR AUTO LOCKS.