Powerful Motor - Unmatched performance under load * 1/8-inch Collet - Compatible with all current rotary tool accessories * Variable Speed (5,000-32,000) - Up to 10-percent faster than the competition * Compact and Lightweight - Only 9.5-inch long and 1.3-pounds * Milwaukee Durability ? Grinder style exhaust ports and protected front bearing deliver up to 10X the tool life