Expander Sets for Open-Head Asphalt Coring Bits

Expander Sets are required when attaching Open-Head Coring Bits to any Core Drilling Machines. Expanders are simply mounted in the bottom of the core drill bits, then threaded onto the drill. Expander Sets can be used many times as the bits wear down and are changed. A different Set is mandatory for each OD bit size used.

Expander Sets for Asphalt Diamond Coring Bits