Carbide Burr Set,Tungsten Carbide Cutting Tools, Double Cut Rotary Files 1/4" Shank 10PCS Carbide Burr Bits High-Speed Spiral Fils for Metal, Plastic, Woodworking

10 Premium Shapes for VersatilitySA-1, SA-3, SC-1, SC-3, SD-2, SF-3, SL-1, SL-3, SE-3, SH-1 | Useful Double Cut: This is the most classic, commonly used, and widely used cut style among all the Carbide rotary Burrs, files, which can be used for cutting and polishing most materials | Bur head with 91.5HRA: The carbide rotary burs/files are made of high-quality Carbide Bur Head that is 91.5HRA (or78.4 HRC) in hardness, that with very good wear-resistant, and theoretically suitable for machining any metal or non-metal or composite materials below 70HRC | Carbide Bur Head is Solid: The Carbide Bur Head is designed to be solid without a tail hole or center hole (for inserting and fixing the shank), which help the Carbide burrs get higher strength and longer service life | R-Shaped Shank: The shank of the Carbide Burrs Rotary Files is designed in the form of R-shaped, which increases the contact area(joint area) between the Shank and the Carbide Bur Heads, making the welding more secure and strong | Very Strong Welding: the Carbide Burrs Rotary files are welded by imported silver based brazing alloy, with low welding temperature, which make the Joint/welding area between the Carbide bur Head and the shank with very strong, and there is no phenomenon of breaking or falling-off of Carbide Bur head from the shank