Internal Hex, External Hex, Internal Torx, TX, Hex
Imperial, Metric, AF, Torx, SAE
11/16 ", 13/16 ", 5/16 ", 7/8 ", 36 mm
1/4, 3/4, 1-1/2, 2-1/2, 3/8
19.05, 6.35, 12.5, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide