External Hex, Internal Hex, Internal Torx, TX, Hex
AF, Imperial, Torx, SAE, Metric
9/32 ", 3/16 ", 9 mm, 17 mm, 32 mm
1, 2-1/2, 1-1/2, 1/2, 3/4
38.1, 6.35, 25.4, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate