Description:Made of CR-V, ensuring high hardness, durability, wear resistance, and corrosion resistance.Equipped with magnetic feature that can firmly fix the screws before installation and after removal to improve efficiency.Widely used in electric drills, electric screwdrivers, hand screwdrivers, pneumatic drills, etc.Specification:Product Name: Spanner Screwdriver BitTip Size: U4, U6, U8, U10Hex Shank Diameter: 6.35mm / 1/4"Each Total Length: 50mm / 2"Material: CR-VPackage Content:4 x Spanner Screwdriver Bit.