Our resin cutting discs set is made by low loss materials with sharp blade, in good shape with no broken edges. It is durable, safe and efficient, can be easily attached to the rotary tools. Ideal for cutting all kinds of metal, cuting bolts or screws or removing rusted or stripped bolts and screws by making slots in them. They come with a 2mm disc for mounting in compatible hobby tools with the same sized chuck. Usage: Use with rotary tools, for cutting metal/plastic/fiber/wood, etc. Material: resin Color: as picture shows Discs diameter: approx24mm Thickness: approx0.7mm Hole: approx. 2.2mm Size: approx. 24mm x 2.2mm Package include: 36pcs/box cutting discs Not include rod