Internal Torx, External Hex, External Torx, TX, Hex
Imperial, AF, Metric, Torx, SAE
9/32 ", 9/16 ", 3/16 ", 5/8 ", 1-1/2 "
1, 3/4, 2-1/2, 1-1/2, 3/8
12.5, 25.4, 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