Internal Torx, Internal Hex, TX, Hex, External Torx
Imperial, AF, Torx, Metric, SAE
9/32 ", 5/16 ", 3/16 ", 5.5 mm, 1/4 "
1/4, 2-1/2, 1/2, 3/8, 3/4
19.05, 38.1, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide