Features Ideal for cutting metal, sheet metal, rusted bolts, and welds Converts Your Drill & Grinder into a Cut off Tool The 1/4" Mandrel can work with your existing 3-inch wheels of 3/8" arbour 25,000 RPM Max Compatible with Die grinders powered by Air or Electric motor that accepts 1/4" Collet Also Compatible with any standard drill, Turn your drill into a Grinder!