7pcs Set Multi functional Heavy Duty Impact Driver Screwdriver Bits Kit with Case Description: This impact screwdriver produces a great torque to turn the bolt by hammering the screwdriver. It can work with hammer to loosen rusty and cold-welded bolts at ease, also can be used to tighten bolts. Including slot and cross screwdrivers in different sizes for various demands. Features: The screwdriver bit adopts chrome-vanadium steel, high hardness, anti-rust and long lasting. 6 screwdriver bits in different sizes to meet your different demands. Widely used to loosen or tighten rusty and cold-welded bolts at ease with hammer. Ergonomic handle offers comfortable grip and control. With a plastic case for well storage, easy to carry. Specifications: Condition: Bit Material: Chrome-vanadium Steel  Color: as Shown in the Picture Weight: approx. 673g Package Included: 1 x Impact Screwdriver Handle 1 x SL7(36mm) Bit 1 x SL8(36mm) Bit 1 x SL8(70mm) Bit 1 x PH2(36mm) Bit 1 x PH3(36mm) Bit 1 x PH3(70mm) Bit