Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Torx, Imperial, SAE, Metric
15/16 ", 7/8 ", 13 mm, 5/8 ", 11/16 "
1-1/2, 3/4, 1/4, 2-1/2, 1
25.4, 38.1, 19.05, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate