0.3 HP Motor Output - more powerful than pneumatic 0.25HP die grinders Max RPM = 24,500 1/4" Collet, 1/8" compatible(sold separately) Optimized RPM setting for most common accessories Dial in the right Max RPM for safer operation Mode 1 = 10,000 Mode 2 = 15,000 Mode 3 = 20,000 Mode 4 = 24,500 No air hoses, compressors or daily maintenance Replaces compressors and air hoses Increased cost savings over pneumatic power Compact tool size allows access in tight spaces Includes (2) M12 CP2.0 Battery, and Battery Charger