Milwaukee M18™ Brushless 4-1/2" / 5" Cut-Off Grinder, Paddle SwitchOur M18 Brushless 4 1 2 5 Cut Off Grinder delivers power and runtime while maintaining its compact size. The 11,000 rpm brushless motor was built and optimized specifically for cutting and surfacing applications. Paired with built in REDLINK power tool technology and REDLITHIUM batteries, the Brushless Grinder provides efficient power delivery and longer battery life resulting in up to 80 cuts in rebar. The Brushless Grinders body is 12. 25" long and