Air Die Grinder, 25,000 RPM, 1 HP, 1/4" and 6mm Collets, Rear Exhaust. You can count on the M2 Series Die Grinders to meet all your industrial, heavy machinery, construction and metal fabrication needs. These die grinders contain an internal contamination-free air controller that maintains the tool’s speed to maximize material removal- so you can trust it to work through your most important jobs. Power: With a powerful, lube-free 1 HP 25,000 rpm motor, you can remove materials quickly and with ease. Suited for heavier-duty grinding, cutting, cleaning, and polishing applications. Productivity: Speed-governed motor on this grinder help maximize the life of abrasives, increasing grinder efficiency and improving productivity. Durable: Built to last, these grinders have an aluminum-core housing with a composite sleeve and can withstand harsh environments and repeated drops. Ergonomic: Low-profile throttle lever and ergonomic handle designed for enhanced operator comfort, to reduce fatigue, and to improve productivity while using this die grinder. Efficient: Quick-change spindle-lock eliminates the need for additional tools. Easy disassembly for motor access. Back cap and muffler with easy rear access for cleaning.