The Mercer 180020B 1-inch Crimped End Brush is used for pipe cleaning, deburring and removing hard carbon deposits from piston heads, cylinders, and valve seats. The Mercer 180020B Crimped End Brush has a face diameter of 1 inch and is made of .008 Carbon Steel wire. Mercer offers a variety of sizes and wire gauges. Features: * Utilizes an internal holding plate to secure brush bristles * Made of carbon steel * 5/8-11 thread What"s In The Box: * Mercer 180020B 1-inch Crimped End Brush