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By certification 
Hybrid drill bit combing fixed-cutter and roller-cone. It is a new design, new technology, wide range of bit. Hybrid bit combine the advantage of tricone rock bit and PDC bit, it has be tested for many times. and it is proved that hybrid drill bit has a good performance in hard rocks.
Quick details
Material: Imported PDC cutters and superior steel
Process: Sintering and forging, maching
Certification: API and ISO9001
Rock formations: Hard rock formations
Application: Water well drilling and oil exploration
Packaging: Wooden box packaging, 1 piece is in 1 box
Shipping: Samples will be shipped by exprss, batch products will be shipped by sea or by air
Delivery: 1-5 days for sample, 1-15 days for batch products.
Packaging and shipping
http://www.tydrillbits.com/
