Name: PDC coring bit Brand: SDTOPS Model: TC113c Size: 75mm~171mm BQ, NQ, HQ, PQ Matrix material: Tungsten alloy Life time: 600m~1000m Application: Geological exploration, coalfield mining, water well drilling and water conservancy and hydropower, etc. Applicable formation: Soft and medium hard rocks, like Sandstone, Shale, Limestone, Conglomerate, Mable, etc. Features: About 10 times useful life than Carbide drill bit; About 4 times useful life than Diamond drill bit