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#16
12-07-2011, 06:12 AM
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From all I've read in reports over the years there are two best choices..
Severns custom Hard Hat, or DLC IonBond is what they coat oil well drill bits for drilling through rock.. IonBond is also used on cutter bits for hard metals.. I've never read a report about anyone who wasn't thrilled with Hard Hat or any of Severns work and will be my choice when CBOB gets a little more beat up..
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