Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Metric, Torx, SAE
15/16 ", 5/8 ", 3/4 ", 26 mm, 11/16 "
1, 1-1/2, 1/4, 2-1/2, 3/8
25.4, 19.05, 6.35, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide