Internal Hex, Internal Torx, External Hex, Hex, TX
AF, Torx, Metric, Imperial, SAE
7/16 ", 9/32 ", 13/16 ", 5/8 ", 11/16 "
1/4, 1, 2-1/2, 1-1/2, 3/4
38.1, 6.35, 19.05, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide