HanShotFirst
Well-known member
Hey all,
I see this on Proto's sockets and combination wrenches...seems like it has to do with the box ends. Can anyone point me to some literature, video, reviews, etc?
Or just a good explanation of what it is?
I see this on Proto's sockets and combination wrenches...seems like it has to do with the box ends. Can anyone point me to some literature, video, reviews, etc?
Or just a good explanation of what it is?