11 Pieces 1/2-Inch Drive Deep Impact Socket Set, 3/8-Inch to 1-Inch, CR-V, SAEMade from drop forged and heat treated chrome vanadium steel(50BV30) with a corrosion resistant black phosphate finish 1 2 Inch drive deep impact socket set: 3 8", 7 16", 1 2", 9 16", 5 8", 11 16", 3 4", 13 16", 7 8", 15 16", 1" 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.