The PORTER CABLE PCC761B 20v MAX Lithium Bare Cut Off/Grinder features a high-performance motor that produces 8,500 rpm for aggressive cutting, removal and finishing. The cast metal gear housing helps disapait heat during extended use and a spindle lock that allows for quick and easy wheel changes. Wheel diameter: 4-1/2". The handle is contoured and overmolded for optimal increased comfort, along with a 3-position side handle that helps to provide control in multiple positions. A tool free guard makes guard adjustments quick and easy. This tool is part of the 20V Max System - a high performance cordless platform. (This is a bare tool item - battery sold separately).