About this item Widely Application -- Widely fit for 2”x72” belt grinders, this knife grinder wheel set can meet your needs and work great in grinding metals, knives, blades, woods, acrylic and other materials. It is widely used in parts factories, building materials factories, etc., perfect for tool polishing. Premium Material -- Constructed with premium quality 6061-T6 aluminum, which have a great wrap rust and corrosion resistant performance. All components are CNC machined and hardened to be high precision and hardness and ensure long-term reliable service. Precision Size -- Include 5” drive wheel, 3” tracking wheel and 2* 2” idler wheel. The Drive Wheel measures 5” diameter with 5/8” bore and 2-1/4” wide. The Tracking Wheel measures 3” diameter and 2-1/4” wide. The Idler Wheel measures 2” diameter and 2-1/4” wide. Great Features -- Each wheel has 3 x heavy duty 6201RS bearings (inner diameter 12mm) fitted inner back and has spacers between the bearings to relieve over-tightening for max bearings life. They are easy to assemble and use, designed non-slip finish ensuring the belt does not jump off the wheel. Satisfaction Guarantee -- Yoursme aims to provide excellent products and best service for customers. You can simply return it if you are not satisfied with the product. We support 12 months warranty. › See more product details