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By certification 
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
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