Brand GEARWRENCH Material Chrome Molybdenum Steel Drive System Nutsetter Finish Type Black Oxide Number of Pieces 44 About this item Chrome molybdenum alloy steel (Cr-Mo) for exceptional strength and durability Off-corner loading design reduces fastener rounding Black oxide finish to resist corrosion Included Components: ‎Standard /Deep SAE: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", Blow molded case, Extension: 3" & 6", Standard Metric: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm, Universal Joint, Deep Metric: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21mm