Cat 300 Trade Double Row Cup wheels are engineered for economical grinding of lips and ridges to make a flat surface. Designed to be used with angle grinders. The product is engineered with a premium fast medium aggressive bond with Medium 30 / 40 # Mesh Diamond grit. Manufactured from a single heavy duty fully ground steel core for strength and eliminates torque and open air ducting enables cooler operation providing faster stock removal and faster grinding. The perfect choice for the enthusiast / occasional user and those medium size jobs for users that want a good life and grinding speed.