Internal Torx, External Hex, Internal Hex, TX, Hex
Metric, AF, Torx, Imperial, SAE
7/16 ", 34 mm, 35 mm, 30 mm, 1-1/2 "
2-1/2, 1-1/2, 3/8, 3/4, 1
19.05, 38.1, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide