- 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"/]
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.