The MILWAUKEE M12 FUEL 1/4" Straight Die Grinder Kit is designed to replace pneumatic die grinders. The die grinder provides users with up to.3 HP performance to outperform pneumatic die grinders by 20%. The M12 inline die grinder features 3-Mode RPM control and a responsive variable-speed trigger providing users with unmatched control with their most common accessories. The cordless die grinder gives users greater access and mobility, eliminating the frustrations of hoses and compressors. In addition to the tool, this kit includes two M12 REDLITHIUM 2.0 batteries.