The IPA 4.5" Diamond Grinding Wheel, No. 8150, lasts a minimum of 20 times longer than traditional grinding wheels, says the company. The disc’s three-dimensional contour with topside abrasive coating and thin profile edge allows for cutting, back cutting, gully grinding and bead finishing with one wheel. The No. 8150 provides versatility with its durable, diamond, abrasive coating. The disc maintains its size and shape throughout its life, providing consistent reach and performance, the company says.