External Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Torx, SAE, Metric
5/16 ", 7/32 ", 9/32 ", 1 ", 5/8 "
1, 2-1/2, 1/2, 1-1/2, 3/8
9.53, 19.05, 6.35, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide