( REGULAR 6 POINT SOCKETS ) 3/8, 7/16, 1/2, 9/16, 5/8, 3/4, 13/16, 7/8, 1, 1-1/16, 1-1/8, 1-1/4 inch.( ACCESSORIES ) Pins: PIN OD 3 X 20MM(1/2*8-14MM), PIN OD 3 X 25MM(1/2*15-36MM). Rings: O-RING ID19X4MM(1/2*8-14MM), O-RING ID24X4MM(1/2*15-36MM).( EXTRA STRONG ) The impact socket is made from heavy duty chrome molybdenum (CR-MO) steel for exceptional strength and flexibility. ( LASTS FOR YEARS ) Black phosphate finish for maximum protection and durability.( GREAT GRIP ) 6 point high torque design grips flat sides of a fastener, not corners, preventing round-off. ( INSTANT IDENTIFICATION ) The impact socket features roll stamped markings to ensure permanent and instant socket identification.( SAFE TO USE ) Designed for use with a locking pin and ring to increase safety when working with pneumatic tools. ( EVA FOAM TRAY ) Each tool has been scanned in a CAD CAM system and a computer controlled milling machine then cuts out each tool’s exact shape in a three-coloured EVA foam block.