External Hex, Internal Torx, TX, Hex, External Torx
Imperial, AF, Torx, SAE, Metric
13 mm, 17 mm, 34 mm, 23 mm, 25 mm
1-1/2, 3/4, 2-1/2, 1/4, 3/8
9.53, 38.1, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate