Internal Torx, External Torx, External Hex, TX, Hex
Imperial, AF, Metric, Torx, SAE
13/16 ", 9/16 ", 5/8 ", 3/4 ", 1-1/2 "
1-1/2, 3/8, 3/4, 1, 2-1/2
25.4, 6.35, 38.1, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide