Internal Torx, External Hex, Internal Hex, TX, Hex
Imperial, Torx, Metric, AF, SAE
1/4 ", 9/16 ", 9/32 ", 5/8 ", 11/16 "
3/4, 1, 2-1/2, 1-1/2, 1/2
6.35, 25.4, 19.05, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide