Item: Radius 6mm Vacuum brazed diamond router bits for stone, 1/2" round shank Quantity:1pc Application: For stone edge profiling/cutting, marble & granite , quartz stone, artificial stone Feature: 1. New vacuumer brazed technic provide much better performance Fast cutting & long life 2. Use wet or dry. Water or other cooling agent is recommended for longer life of the bit. 3. Bottom stop bearing keeps the bit from cutting into the stone.