This extension is threaded on both ends with 1-1/4-7 thread for use with Diamond Core Bits over 2 inches in diameter. The extension mounts directly to Milwaukee DymoDrill spindle. Up to two extensions can be coupled together for deep coring.
Features
For use with Diamond Core Bits over 2 in. in diameter
Threaded on both ends
Up to two extensions can be coupled together for deep coring