Ko-ken Tools 1/2 Sq. Dr. Socket 27mm Pathfinder Length 85mmMETRIC, 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 socket to engage the nut. Input Drive Size; 1 2" Drive shape: Square Length: 85mm Type: Pathfinder Socket Output size: 27mm Product Dimension