Expander Sets for Open-Head Concrete Coring Drill Bits

The Concrete Expander Sets are used to connect Core Drilling Machines and are required when using Open-Head Concrete Coring Drill Bits. Expander Sets are easily installed at 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.