Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, AF, Imperial, Metric, SAE
3/16 ", 5/8 ", 11/16 ", 29 mm, 1-1/2 "
1, 3/4, 1/2, 2-1/2, 1-1/2
19.05, 6.35, 38.1, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide