Sworker 20 Pcs 1/8"" Shank Carbide Burr Bits Compatible with Dremel Bits Metal Grinding Bits Wood Stone Carving Cutting Engraving Grinder Kit Attachment Rotary Tool Accessories Set Harder Than Diamond

20Pcs 3mm Shank Tungsten Carbide Burrs Set Kit Double Cut Head Diameter 3mm 10pcs and Head Diameter 6mm 10pcs Head Diameter 3mm burrs material is solid tungsten carbide Head Diameter 6mm burrs's head material is tungsten carbide Head Diameter 6mm burrs's shank material is 40Cr steel. Head Shapes: End-Cut Cylindrical Dome-End Cylindrical Ball Oval Ball-Nosed Tree Tree Flame Cone Inverted Cone. What is in the box: 20Pcs tungsten carbide burrs 1 manual 1 plastic box and 1 paper box.