Features and Benefits: INSIDER Box Ratchet Adapters are exclusively compatible with the M12 FUEL INSIDER Box Ratchet; Allows use of current 1/2" drive sockets with INSIDER Box Ratchet; Laser etched part number; Box Ratchet sockets chamfered end allow quicker and more effiecient insertion and removal; Meets ASME Industry Standards; Ball detent design for superior socket retention;