The cut-off wheel is reinforced with fiberglass for increased durability and used for cutting metal including hardened steel;Great for contractors and the home hobbyist. Fits Chicago and more. Perfect for cutting, grooving and trimming all kinds of metal. May also be used on other materials-including thin wood, plastics and ceramics. Cut bolts or screws or make slots in rusted or stripped bolts and screws. Material:Fiberglass Colour:Grey : 100Pcs Cut Off Wheel Disc + 1pc Mandrel Disc Diameter: . 32mm/1.26 inch Disc Thickness: . 0.9mm/0.035 inch Connecting rod: 2.35mm Please note: The cut-off wheel cuts only along edge. Do not attempt to sand or cut curved holes with . objects to a stable surface while working. Hold the tool so that the wheel is at a perpendicular to the material being cut. Keep a light touch, as the wheel will break under too much pressure. If chattering occurs, increase speed. Plastics require very slow speeds, because they tend to at the contact . Wood requires low speeds also, always experiment on a first. Package Included: 100 x Fiberglass Reinforced Cut Off Wheel Disc with Mandrel Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.