The Mayhew Tools ProPneumatic 8mm Valve Guide Remover, No. 32037, is designed for removing old style valve stems (not for use with on tires with TPMS or TPS sensors). Made of shock-resistant steel alloy that is fully hardened and tempered, the Valve Guide Remover features a standard 0.401 Turn Type Parker Shank. It also offers a black oxide finish that helps prevent corrosion and improve durability. This tool is part of the company's ProPneumatics line, made in the U.S.A. and is backed by a lifetime warranty.