... in mining drilling,metal cutting and grinding processes 3 big fields.ABOUT PRODUCTDrag bit also named blade ... the blades,they are applied to rock formation f≤6, like mudstone, shale, sandstone, etc. mainly used ... 2. Boosts production rates by reducing change over.3. Fast penetrating two wing drill bit for wet ... diamond layer sintered with tungsten carbide substrates. 9 3/4" inch 248mm drag bit/pdc drag ...