Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
7/8 ", 5/16 ", 5/8 ", 9/16 ", 11/16 "
1, 3/4, 2-1/2, 1-1/2, 1/2
6.35, 12.5, 25.4, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide