The wheels are completely coated with fine diamond particles, which adds extra durability and , while producing fine'smooth cuts. Holes in the face of the wheel keep it cool during use. Ideal for cutting, sawing, and carving marble, concrete, glass, porcelain, ceramics, and soft or hard wood. Working diameter: 0.86 inch(22mm) 10 pcs / 1.18 inch(30mm) 10pcs,1/8 inch shank,80 Grit The cut off saw blades are made of high speed steel and there are totally 6 wheel diameter: 22/25/32/35/44/50mm. Ideal for cutting wood, plastic, copper, laminate and aluminum. 1/8 inch shank. Reinforced with fiberglass for increased durability to cut, slice, trim and groove into a variety of metals including hardened steel, slotting bolts, screws or sheet metal, thin wood, ceramic and plastic. Designed for cutting sheet metal, slots bolts, screws, plastic and thin wood. Do cut only along its edge. Do not attempt to sand or cut curved holes with them. Suitable for most rotary tools or power die grinders'air tools which accommodate a 1/8 inch shank size. The rotary cutting wheel set is ideal for cutting grooving'trimming metal, wood, drywall, plastic, glass, stone, ceramic, hard alloy, the treasure jade stone processing and more. A great helper for DIY enthusiasts and home hobbyist. Colour:As Shown Material:Metal Package Contents: 1 set * Cutting Wheel 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.