Quantity20 pcs Solid Carbide Rotary Burr Set, 0.118 inch shank(3mm) ,approximate 1/8 inch, fits dremel and most small rotary toolsDurableWhole Piece made of heat-treated solid tungsten carbide that lasts long working life, sharp and sturdyTargetSuitable for all skill level | this is a essential kit for woodworkers & enthusiasts who cleans up welds or works with metal frequently, easy to grasp and use, safe and reliableVersatileWidely used for metalwork, tool making, model engineering, wood carving, jewelry making,welding, chamfering, casting, deburring, grinding, cylinder head porting and sculptingConvenientGenerally can be used with handheld electric or pneumatic tool drive (can also be used in machine tool)