Internal Hex, External Hex, Hex, TX, 6-Point
Imperial, Torx, Metric, AF, SAE
13 mm, 3/16 ", 5/16 ", 5/8 ", 11/16 "
1, 1-1/2, 2-1/2, 1/2, 3/8
9.53, 12.5, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide