| 31. | Drill into the concrete with a masonry drill bit then insert the expansion plugs.
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| 32. | You will need to use " carbide concrete / masonry hammer drill bits ".
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| 33. | It is often used in power-saw blades and drill bits.
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| 34. | This will reveal any contamination of the sample from the drill bit material itself.
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| 35. | You must use special percussion drill bits for this operation.
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| 36. | It didn't go up because the oil companies broke a few drill bits ."
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| 37. | Instead, gun drill bits are preferred for deep hole drilling.
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| 38. | Diamond hole saws are also called diamond core drill bits.
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| 39. | When buying drill bits, be sure to look for ones made of high-speed steel.
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| 40. | A core drill bit may be used to double the size of a hole.
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