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