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