Internal Torx, External Torx, External Hex, TX, Hex
Imperial, Torx, Metric, AF, SAE
3/16 ", 8 mm, 5/16 ", 35 mm, 23 mm
1-1/2, 1, 2-1/2, 3/8, 3/4
25.4, 9.53, 19.05, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide