Why Choose SUNJOYCO Polishing Grinding Wheels? 1. These polishing bits are carbide tools, have no dust pollution, and have a service life of the equivalent of several hundred with a handle grinding wheel, and grinding head. They are easy to master, simple to use, safe, and reliable. 2. These polishing tips compatible with Dremel are made for mixed abrasive machining, metal processing, non-metallic parts, and handicrafts. You can choose according to different machining parts strop stone shape, cylinder-shaped grinding heads (diameter: 10mm/8mm/6mm/5mm/ 4mm) bullet-shaped (diameter: 10mm/8mm/6mm/5mm/4mm) 3. Fit for any hobbyist or professional, all of you can create detailed and intricate work with the accessories featured in this kit! Specification: Material: Sanding, wool, sesame, rubber, cowhide Head Shape: Cylinder, Tapered Head Diameter: 4mm 5mm 6mm 8mm 10mm Shank Diameter: 1/8 inch (3mm) Total Quantity: 50 Pcs Package includes: 10 x Sanding Polishing Grinding Wheels 10 x Wool Polishing Grinding Wheels 10 x Sesame Polishing Grinding Wheels 10 x Rubber Polishing Grinding Wheels 10 x Cowhide Polishing Grinding Wheels