Knurling tungsten carbide of the bush hammer plate is designed for texturing marble and other soft stones, to create the bush-hammered finish on the surface of the stones. So far, we have 3 models of bush hammer plates that use knurling tungsten carbide, BHP16, BHP17, and BHP18. These bush hammer plates care usually used on the angle grinder, but also fit for floor grinders, with the help of adapters. Knurling Type Bush Hammer Plates: The knurling finish made by our BHP18 (before upgraded): In order to improve the performance of our bush hammer tools. We have already upgraded our knurling type tungsten carbide in last week. Compared with the old one, the new knurling carbide block is sharper and has higher strength and delivers better performance. Please check the comparison photo as follows: