Depressed center. Type 27. Wheels with 5/8"-11 threaded bore come with Super-Lock hub which combines a mechanically interlocked transversed key lock system with a high shear strength epoxy adhesive. A24N – Fast stock removal. Aluminum oxide grain. Use on all ferrous metals (iron, steel, welds, etc.). Also for use on low grade stainless steel. A24R - Long life. Aluminum oxide grain. Use on all ferrous metals (iron, steel, welds, etc.).
