Agile-shop 14Pcs Heavy Duty Impact Screwdriver Driver Bits Tool Socket Set Kit With Case brand new and high quality. For use with your hammer to loosen frozen and rusted on screw Bolts bits to prevent rust and chipping plus a textured handle for total comfort and control. This impact screwdriver allows you to use your own hammer to loosen rusty or frozen screws and bolts with ease. This impact screwdriver features black oxide coating on the bits to prevent rust and chipping plus a textured handle for total comfort and control.