The Dormer P803 Solid Carbide Bright Rotary Burrs have cylinders with end cuts and produce double cuts. The first choice for general machining, improves ease of control, increased metal removal rate and breaks swarf into manageable pieces. They have toughened and hardened steel shanks that provide rigidity and strength. This prevents bending and reducing vibrations for an improved tool life. Ground to h6 (Carbide) and h7 (Steel). Excellent impact strength that is able to withstand high forces and to withstand higher temperature without failing. Special brazing elements provide excellent braze strength. Ref: UTTK2708