I have oil drain plugs that are 15mm and 17mm. They are not high torque bolts. I carry a 1/4" ratchet & socket set in my tool kit. I have a 15mm & 17mm with 3/8" drive and 1/4"-3/8" converter.
Looking for 1/4" drive 15 & 17mm sockets, do they exist?
Looking for 1/4" drive 15 & 17mm sockets, do they exist?