Rotary Burr Sets 6mm shank Moce rotary burr burrs are made of high quality carbon steel, sharp and stable, with sphere, round hair, short hair, big cones and small cones.< /p> Easy to useSafe and reliable, reducing labor intensity and improving the working environment. main functionCan be used for engraved drawings, chamfering, recessing, grooving, boring, etc. < p>Available forRotary cutters are available for handling wood, non-ferrous metals, plastics and rubber. specification Sphere: 6mm rod, 52mm length Round: 6mm rod, 56mm length Short hair: 6mm shaft, 56mm length Large cone: 6mm shaft, 60mm length Small cone: 6mm shank, 52mm length Color: Black Material: Carbon steel Balance: +/- 0.003'' tolerance Package includes: 5 x Rotary Cutters < p>5 shapes Ball/oval/cylinder/big cone/small cone Applications Ideal for engraving, woodworking, cutting, grinding, deburring, reaming. Real tool, design your life- Can be used on all types of metal, wood, stone, porcelain, sheet metal, plastic, fiberglass, etc.