? Toolroom Wheel >4",Toolroom Wheels ? Handle stock removal quickly with superior cuts when you choose this SG 5SG CA Type 05 toolroom wheel for your cylindrical or surface grinder. The high performance bond holds its form well and is versatile enough for use in grinding steels, titanium, super alloys and irons. This wheel is an excellent choice when you want a low per-part grinding cost. Its high-performing seeded gel ceramic alumina and friable aluminum oxide abrasive blend lasts three to five times longer than conventional aluminum oxide wheels, and its self-sharpening abrasive maximizes sharp edges on tools and dies. ? Type 05 recessed one side wheels with high-performance ceramic alumina and friable aluminum oxide blend for fast stock removal, cool, superior cutting; 3 - 5X more life than aluminum oxide wheels; 2X rough stock removal vs conventional abrasives ? High performance bond for versatility (for grinding high sped tool steels, hardened and soft steels, and aerospace alloys) and exceptional form holding ? Self-sharpening abrasive minimizes burn and dressing, to maximize sharp edge on tools and dies for longer life in production ? Outstanding choice for high productivity, low total per-part grinding cost on cylindrical, and surface grinders ? Made in USA in ISO certified facility