CHAMFERING ROUND HOLE BURR REMOVAL EXPERT: you can use it to clean up 3D prints, it is perfect for countersinking round openings on wood, plastic or metal; much manual countersinking. Produces smooth edges on the hole. AND COUNTERSINK DRILL BIT: This gadget works great and is a great addition to my workbench; and countersink drill bit, countersink milling cutter drill bit is made of M2 high-speed steel, and more efficient to help you get the . COUNTERSINK ROUND HOLE DIAMETER PROCESSING RANGE: suitable for countersinks from 1 to 16.5 mm in diameter, RD16.5-BC1651 90 countersink blade. PRACTICAL AND EFFICIENT GADGET: Works exactly as expected; The drill bit can be easily installed by compressing the mounting head; The installed blade can be flexibly rotated 360 degrees; It is and easy to remove burrs; Please be careful and keep away from children. ERGONOMIC METAL HANDLE: The polygonal design is designed to maximize grip and hand comfort, the comfortable grip can be used for a long time without discomfort. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:High speed steel M2 Package Contents: 1 * countersink milling cutter drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.