Description:1.Quenched and heat-treated S2 alloy steel bits, hardness arrived at 58-62 HRC, reduce wear-outs.2.Chrome-molybdenum steel provides excellent durability and strength with every impact movement; black phosphate finishes for extra protection against rust and corrosion.3.Use with ratchet to improve speed in tightening Torx drive fasteners. And the product has no insulation properties and is not suitable for electrical environments.
