Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, AF, Torx, Metric, SAE
9/32 ", 15/16 ", 11 mm, 5/16 ", 11/16 "
1-1/2, 2-1/2, 3/8, 3/4, 1
9.53, 25.4, 38.1, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide