13-Piece Impact Bolt & Nut Remover Set Nut Extractor Socket Bolt Remover ToolFirst of all,thanks so much for your attention to our products! In order to better understand and use this socket,pls read the instruction carefully before using and keep it for future use. Feature: 1. The bolt extractor tool made of high hardness chromium molybdenum steel, the surface of the sockets is phosphated and coated with a small amount of wet oil to enhance durability and corrosion resistance. 2. Nut and bolt extractor set adopts reverse