Ingersoll Rand’s EDGE Series 422G 5″ Air Angle Grinder is the right tool for the job. This all-purpose, powerful 1.0 HP, 5″ angle grinder features a unique motor controller that virtually eliminates over-speeding. The powerful 1 HP motor provides plenty of force for rust and material removal. The 422G pneumatic grinder is suited for metal dressing, rust removal, weld preparation, and automotive bodywork fabrication.