1.[Tungsten Grinder Bits]: These carbide Cutting burr, with 1/4 inch is made from Tungsten Carbide. Length:70mm, Cutting Diameter 1/2 inch, Length 45mm, Diameter 1/4 inchFor Bits Accessories For , Fordom, , . 2.[DOUBLE CUT DESIGN]: The groove lines of these carbide burr's head are crossed, which makes it more suitable for materials with relatively low density, such as wooden, plastic and aluminum. 3.[Durable]: Hardness can reach to Less than HRC70, lasts long working life, sharp and durable. 4. [LONG WORKING LIFE]: The working life of these solid burr is 10 times longer than high-speed steel and 200 times longer than grinding wheel. 5.[Usage]Carbide drill file is widely used in metal products, manufacturing, engineering, model construction. Cutter diameter:047 inch/12mm Length of cut:1 inch/25mm Edge:Double Shape of Cutter: Cylindrical Warm Tips: your burr is well inserted into your collet and clamped down tightly. Please wear an eye mask to protect your eyes from filings. Please confirm the size you need to buy before purchasing. size: length 70mm Material:Cemented carbide colour:silver Package Contents: 1 * Cylinder Shape Burrs 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.