Suitable for welding work and worn or damaged screws and bolts, the screwdriver set is essential tool for enthusiasts and professional The screw extractor have a square center section and comes with extension rod for leverage The extractor features double-headed designs of different size The extraction and repair can meet different requirements and is widely used This screw extractor set is selected from high carbon steel, which is rust-proof Screwdriver set provide a 2 in 1 function for damaged or rusty screws and bolts as well as repairing threaded connection on pipe, Manufacturer: Oxxggkao