Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Torx, SAE, Metric
11/16 ", 23 mm, 33 mm, 29 mm, 30 mm
1, 2-1/2, 1/2, 1-1/2, 3/8
19.05, 9.53, 38.1, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide