Urhelper 6-piece 1/8 Inch Shank HSS Wood Working Rotary Bits Set Routing Router Burrs Fits Dremel Tools Compatible with other multi-tool machines including Dremel Perfect for all sorts off jobs like Model making, mini DIY wood projects and more For processing of soft metal and Non-metallic surfaces, great for craft, airfix modelling Mandrel shanks: 1/8 inch; total length: approx 40mm Mostly for wood or plastics drilling holes, slotting, engraving, chamfering and deburring and more