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The HM-71 Gilson Concrete Rebound Test Hammer quickly provides reliable estimates of in-place concrete strengths, allowing rapid assessments of large areas and delineation of potential problem area. This reasonably-priced alternative to the original Schmidt brand is Made-in-America and meets all published specifications for these devices. A durable nylon carrying case with loop handle, carborundum stone for surface preparation, instructions and charts are included with the HM-71.
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