DescriptionThis item is a set of 30pcs professioanl grinding bits, which are made of stainless steel and diamond-tipped, for fine detail, engraving, carving, touch and finish work on materials such as wood, jade, ceramic, glass, hardened steel, semi-precious stones and other hard materials.Features- Color: silver.- Material: stainless steel, diamond head.- Size : 14.5x6x2cm.- Shaft diameter: 2.35mm.- Made of material, durable and practical.- This product is light and convenient to carry- for fine detail, engraving, carving, touch and finish work on materials such as wood, jade, ceramic, glass, hardened steel, semi-precious stones and other hard materials.- Compatible with most multifunction tools, such as for , Proxxon and many other manufacturers.