Made from drop forged and heat treated chrome vanadium steel with a corrosion-resistant black phosphate finish 1/2-Inch drive deep impact socket set: 10mm, 11mm, 12mm, 13mm, 14mm, 16mm, 17mm, 19mm, 21mm, 22mm, 24mm 6-point flank drive design grips fastener more tightly on the flat sides and prevents rounding off at corners. Permanent high visibility laser etched size marking on each socket for quick size selection when working. Meets or exceeds ANSI performance standards. It comes with 1 year quality warranty.