New 10pc 1/8in HSS Routing Router Woodworking Bits Burr Fit Dremel Rotary Tools Shank diameter: 3mm(about 1/8''); Length of burr: 4cm Material: High-Speed Steel, pack of 10 a set with a PVC case New designed, new cutting edges; cutting burrs are in different shapes, wide usages, more durable Ideal for most kind of woodworking projects, plastic, soft metals for carving, engraving, drilling Fits normal electric rotary drilling tools as dremel