METRIC, 1/2” DRIVE, PATHFINDER, STANDARD LENGTH, IMPACT SOCKET.  The beveled flats of the 6-point opening of the PATHFINDER socket engage the nut almost immediately. PATHFINDER sockets are ideal for use with power tools in automatic assembly processes, as the power tool does not have to be totally stopped for the socke 1/2 Sq. Dr. Socket 21mm Pathfinder Length 38mm