1. reliable quality and competitive price 2. Used for mining, water well drilling and oil well drilling 3. quick delivery Specification: Φ50-59, φ65, φ73-75, φ89, φ94, φ108, φ115, φ120, φ133, φ146, φ153 PDC bit can be divided to core bit, non-coring drilling bit and anchor bit. This kind of bit has the advantages of long useful life, high efficiency, wide using range, good gage protection, and ...