1It is made of S2 alloy steel material, overall heating treatment, hardness ofHRC58, high torque and good toughness, sturdy and durable 2The surface is processed by special blue treatment, good-looking, and not easy to rust 3Surface printed with specifications, easy to choose the one you need 4The magnetic head of the bit is convenient to use and not slip 5Wide application range, fit most electric screwdrivers, drills or other power tool
