Obviously far more potent than the cordless grinders because of the voltage being 5-13 times higher (depending on your country) but air tools are top of the tree if you have the equipment to drive them.

• Grind through shafts or nuts.

• Grind off heads.

• Grind away paint and corrosion.

• Grind flats onto shafts or heads.

• Torque is handy, RPM is the key.

• 12,000 RPM or better.

• Always wear eye protection

• Always use shock protection

• Consider impact protecting gloves