Expander Set for Open Head Drill Bits is required to connect a 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
Meets Test Methods:
AASHTO T 24
ASTM C 42