Carbide discs for grinders that accept 4" discs. Use to make tires come in faster, or to refresh used tires. Each size has a 5/8"-11 threaded center.
Serious injury can result from use of these discs. Never use discs on a tire that is not inflated and fastened to an axle or stand. When in use these discs can cut off limbs in a matter of seconds!