Our M12 FUEL� 1/4" Straight Die Grinder is designed to replace pneumatic die grinders. The die grinder provides you with up to .3 HP performance to outperform pneumatic die grinders by 20%. The M12� inline die grinder features 3-Mode speed control and a responsive variable-speed trigger giving you unmatched control with your most common accessories. The cordless die grinder provides you with greater access and mobility, eliminating the frustrations of hoses and compressors.