DF: Fine diamond bur. For roughening metal surfaces to be provided with a veneer. The DF bur has pyramid-shaped cutting tips. It works as an abrasive. Slightly rough surfaces. ISO: 500 104 194141 023 - Maximum Speed: 100,000 rpm - GRIT CONICAL ROUND Diameter: 023 - Shank: HANDPIECE - Application: EXTRA FINE PRECISE AND NON-PRECIOUS METAL GRINDING - Packaging Quantity: 1