Handy, two-in-one tool quickly and easily removes carbon fouling from critical areas of the bolt and carrier to ensure proper bolt function and reliable cycling. Scrape carbon from the carrier with the reamer end of the tool, then clean the bolt tail with the other end. The unique, lathe-like design adjusts to fit any bolt tail radius, ensuring a universal-fit tool for any AR bolt. Made from hardened carbon steel, zinc plated for corrosion resistance. An ideal tool for the range bag, field armorer's kit, or "necessaries" bag. Mfg: Magna-Matic Corporation SPECS: Hardened carbon steel, zinc plated. CRT-15 - 5½" (14cm) long, ½" (1.3cm) wide, 1-1⁄8" (2.8cm) high. Fits .223/5.56mm AR-15/M16/M4 bolt and bolt carrier.