• Shank: 5/16"

• Comes With Bosch Quick Change Holesaw Arbor

• Use To Enlarge Previous Made Holes

• Large And Small Washers Allow Two Different Holesaw Sizes To Be Used Together

• Fits Most Major Brand Hole Saws

Warning this product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.