Expert Quality, Draper Expert HI-TORQ® 6 point deep sockets 75mm long, forged from chrome vanadium steel hardened, tempered and chemically blacked for corrosion protection. Hole for receiving ball retainer. Packed in steel carrying case.|10x Sockets: 10, 11, 12, 13, 14, 17, 19, 22, 24, 27mm|Safety Note: ONLY impact sockets and accessories can be used with air or electric powered wrenches. NEVER use silver chrome vanadium steel sockets which can shatter and cause personal injury. This is for 1/2 square drive.