Home Products Power Tool Accessories Hole Saws Hole Saw Arbors Arbor-A 1/2-20 Thread 7/16″ Hex Shank 1/2″ Chuck-Hole Saw Arbor Arbor-A 1/2-20 Thread 7/16″ Hex Shank 1/2″ Chuck-Hole Saw Arbor (05303) Fits bi-metal hole saws 9/16-Inch to 1-1/8-Inch Threads are 1/2-20 Shank size 7/16-Inch Find a Retailer