Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Torx, AF, Metric, SAE
7/32 ", 5.5 mm, 5/8 ", 11/16 ", 25 mm
1/4, 3/4, 1-1/2, 2-1/2, 1/2
9.53, 19.05, 6.35, 12.5, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide