Home Products Power Tool Accessories Hole Saws Hole Saw Arbors Arbor-B 5/8-18 Thread 7/16″ Hex Shank 1/2″ Chuck-Hole Saw Arbor Arbor-B 5/8-18 Thread 7/16″ Hex Shank 1/2″ Chuck-Hole Saw Arbor (05305) Fits bi-metal hole saws 1-1/4-Inch to 6-Inch Threads are 5/8-18 Shank size 7/16-Inch Find a Retailer