3/4" X 3-3/4" Round C9 Whirley Bit
Whirley Bits on this page have a 3/4" x 3-3/4" round shank. These are 4 spline whirley bits - also called C-9 Sparta, CP-9A, MRD-9, 5-LHD.
These bits utilize hollow steel so air flow can continuously keep the drill hole clear as well as a carbide tip to handle the hardest material. Champion offers hole sizes from 5/8" to 1-1/2" in diameter with lengths available to 48". Champion Chisel Whirley Bits are proudly Made in the U.S.A.