This new arrival 300mm PCD bridge scratcher is a fantastic bush hammer tool designed to be used on CNC bridge cutter. It is excellent for creating the multi-lines finish on granite, marble, and other stones. Compared with tungsten carbide, the material of PCD has a much better hardness (reach to 10000HV), high heat conductivity, and high wear-resisting property. It is an ideal material for scratching both hard stones(granite) and soft stones(marble), with high & stable performance and long lifespan. Features of PCD type bridge scratcher : Amazing bush hammer tool to be used on CNC bridge cutter. High productivity for scratching granite, marble and other stones. PCD heads instead of carbide heads, which increases its performance and lifespan. Bolt has been optimized for dust prevention, which can improve its lifespan. Line width can be set free for 2.5mm or 5mm. PCD heads are supplied. Stable performance & competitive price. Check our demonstration of this 300mm bridge scrather: BHR9