Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
11/16 ", 5/8 ", 9/16 ", 7 mm, 5/16 "
1, 2-1/2, 1/4, 1-1/2, 3/8
12.5, 19.05, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide