Internal Hex, External Hex, Internal Torx, TX, Hex
AF, Metric, Imperial, Torx, SAE
11/16 ", 35 mm, 29 mm, 32 mm, 30 mm
1, 1-1/2, 2-1/2, 3/8, 1/2
25.4, 6.35, 19.05, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide