External Hex, Internal Torx, Hex, TX, External Torx
Imperial, AF, Torx, SAE, Metric
9/32 ", 11/32 ", 3/16 ", 4.5 mm, 7/16 "
1/4, 1/2, 3/4, 2-1/2, 3/8
19.05, 38.1, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate