Is it rare, quality control error, or defect? The 'left-lock-right' indentions on the left side of the warning face and the selector opening on the the part number side.
I just noticed it on one of mine. Any significance?
Friction ball lets go too easily. Collar lock extensions dont look practical to me.
I would think proto makes them but i cant find them on their site. Only hex to square drive.
Who makes such a thing?