Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Metric, Torx, AF, SAE
3/16 ", 7/16 ", 5/8 ", 9/16 ", 11/16 "
1-1/2, 2-1/2, 1/2, 1/4, 3/4
6.35, 19.05, 25.4, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide