... 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 ... higher than that of alloy bit and 10 times higher than that of diamond bit.2. It has high drilling speed.3. It can ...