Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Imperial, Torx, SAE, Metric
7/32 ", 9/16 ", 7/16 ", 7/8 ", 28 mm
1-1/2, 3/4, 2-1/2, 3/8, 1/2
19.05, 25.4, 6.35, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide