This is our 6'' or 152mm tungsten carbide inserts tricone bit, it is produced with tungsten carbide inserts and steel under forging process. Widely used in the water well drilling. Except for 6", we also supply 4 1/2", 5 1/2" , etc size till 17 1/2". with milled teeth and tungsten carbide teeth. When you send inquiries, please tell us the tricone type you need( milled teeth tricone bit or tci tricone bit), and also the rock formation or IADC code, model sizes, quantities. More information will be good for us to provide you an exact price.