External Hex, Internal Torx, Internal Hex, TX, Hex
AF, Torx, Metric, Imperial, SAE
13/16 ", 9/16 ", 7 mm, 9 mm, 28 mm
1-1/2, 2-1/2, 1/4, 1/2, 3/8
19.05, 9.53, 25.4, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide