• Adaptor for machine used nut driver sockets • ¼”, 3/8” and ½” external squares • Pin type, to be used in an impact socket with penetration hole (except code K6650-1/4-1P with friction ball; for regular nut driver sockets) • 1/4" hexagon drive, suitable for power tools with DIN 3126, ISO 1173, style E 6.3 • Suitable for DIN 3120, ISO 1174, style F 6.3, F 10, F 12,7 • In plastic box of 5 pieces and in a blister card of 1 piece