Hougen 14009 Holcutter Arbor for Quad-Lead,Hougen,14009HOU" /> Used for 3/8-inch chucks Use with 13007C pilot drill for all Holcutter sizes Four individual threads on the arbor allows the cutter to quickly be threaded on or off the arbor Arbor is for use in 3/8-inch or larger drill chucks Can produce holes three times faster and cleaner than hole saws