• Pilot Diameter: 5/16"

• Chuck Capacity: 1/2"

• Use To Replace Jacobs K3 Or Miller Falls 3MK2 Chuck Key

• Manufactured To Precision Standards From Cold Rolled Steel

• Heat Treated And Plated To Resist Corrosion

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.