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Expander Sets for Open-Head Concrete Coring Bits

The Concrete Expander Sets are used to connect Core Drilling Machines and are required when using Open-Head Coring Bits. Expander Sets are easily installed in the end of the core barrels, and are then screwed onto the Core Drill. They are long-lasting and can be reused multiple times throughout core barrel replacements. A different Expander Set is required for each diameter bit used.