Ingersoll Rand has a terrific product in their cordless die grinders. Cordless gives you mobility, flexibility, and maneuverability, combined with the power that comes with air tools. Ingersoll Rand power tools also give you a choice of straight or right angle and have an exclusive motor control to prevent motor damage from stalling or overheating. Even the variable speed control assists you in finishing detailing while providing maximum safety. Dies are a complicated production investment of equipment, time and money; high quality grinders will give the fine details customers expect especially with big projects.