Swivel action makes deburring, chamfering, and countersinking holes fast and easy. Molded handle features 2" long plated steel "Dog-leg" crank with 1/4-28 threaded holder. Includes one 3/8" diameter 100 degree 3-flute countersink bit and 8" extension shaft for those hard to reach spaces. We also offer the Countersink Bit separately (Part No. 6703).