Weiler® Tiger® Zirc 2-3/4 x 3-1/2 in type 16 cones are designed to deliver exceptional durability and a fast cut rate for performance you can count on. Our advanced bond technology provides long product life while sharp and durable zirconia abrasive grains cut smoothly and hold up in the most challenging foundry cleaning room applications. The type 16 shape features a tapered design with 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 cones offer a 5/8-11 in arbor and are designed for use on straight grinders and die grinders. Tiger® Zirc Grinding Cone, Portable, 2-3/4 in Diameter Maximum, 3 1/2 in Head Thickness, 20 Grit, ZA20S Grade, 5/8-11 Center Hole, Synthetic Resin Bond, Type 16/Round Tip Shape, 5/8-11 UNC Thread, 13195 RPM Maximum, Zirconia Alumina Abrasive