Screw extractor set 1.Material:45# carbon steel 2.Process: black coating in surface 3.Size:3-6,6-8,8-11,11-14,14 ... -18,18-25mm screw extractor setSize:3-6, 6-8, 8-11, 11-14, 14-18mmMaterial ... and so on),and other tools.Our best-seller products: screw extractor set