Weiler Tiger Ceramic 2 x 3 inch type 18R plugs deliver the next evolution in technology for portable foundry grinding. The ceramic grains leverage an engineered ultra-fine microstructure that self-sharpens for ultra-fast grinding. The type 18R shape features a rounded cutting surface that is ideal for ID cleaning, hole edge beveling, smoothing weld seams, removing gates and parting lines, and cleaning castings in hard-to-reach places. These plugs offer a 5/8-11 inch arbor and are designed for use on straight grinders and die grinders. Click on the Weiler link at the top of this page to shop more quality Weiler products in the Weiler brand store.