CDA-46 4.25in (108mm) Expander Set for Open Head Drill Bits is required to connect 4.25in Concrete or Asphalt Open-Head Core Drill Bits to an electric or gasoline-powered Core Drilling Machine. The Expander Set fits into the open end of Open-Head Coring Bits and threads onto core drills. The Expander Set can be reused multiple times as coring bits wear out.
Features:
- Connects Open-Head Coring Bits for asphalt or concrete to a Core Drilling Machine
- Can be reused indefinitely as core bits wear out
- Available in sizes to fit Open-Head Bits
Included Items:
- Expander Set for Open Head Drill Bits
