Used but very much life left on it. Sandvik Coromant Swedish carbide rock drill bit, VERY heavy duty! I cut through New England granite boulders with these suckers with relative ease.
16" Premium Concrete Core Drill Bit 1-1/4 -7 Threads Our premium diamond core drill bits for concrete are designed to drill deep into concrete. Concrete is more abrasive than granite. As a result, our diamond segments for concrete core drill bits are formulated to be more tightly bonded to ensure both life and drilling speed.
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