Kit includes: Air Hammer & 4pc Chisels Includes Tapered Puch Chisel, Flat Chisel, Spot Welder Chisel, Sheet Metal Chisel Free Speed 3000BPM Uses a hard steel cylinder Quick change retainer for quick chisel replacement Easy change retainer for quick accessory changing Attach each chisel to remove rust from mufflers and pipes, cut body panels, and peel off spot welds