[Stone grinding body] The grinding stone is made of high quality material, red corundum sand, manufactured, which is evenly grainy, and more durable.It can be used for a long time with good wear resistance.It can remove rust from metal castings without rusting or falling out like steel brushes. [Excellent grinding effect] The rotating tool grinding stone head offers with even grit, abrasion resistance, sharp grinding grains, less dust when polishing stainless steel and other metals and much faster polishing speed excellent polishing results.With the grinding pin set it can a lot of time and the polished surface is cleaner and brighter after polishing. [Different models] shaft can be used with drilling machines and most tools. [Wide use] Abrasive assembled stone grinding set Suitable for trimming, polishing and grinding a of objects : Mold, metal, plastic, jade, and wood, etc. Several fit into tight rooms for other grinding and shaping needs, such as curved, flatAnd slit surfaces. Colour:As Shown Material:corundum Size:3.17 x 15MM, 3.17 x 10MM Package Contents: 1 x Professional Sharpening Pen Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.