Pearl's Premium Carbide Burs feature precision ground tungsten carbide for aggressive cutting and long working life. Available in a wide range of shapes and sizes and also in double cut or single cut varieties. Pearl Premium Burs are perfect for weld dressing, smoothing castings, shaping holes and more. SG - ARCH POINTED NOSE: Ideal for processing small places, and acute-angled contour Double Cut - The most popular bur for ferrous materials. The flutes are precision ground in both left and right directions, offering aggressive stock removal and a smooth finish.