Description Rust proof. 1/4" shackle diameter with 2-1/2" vertical shackle clearance. Nickel plated finish. Two brass keys included. M1 keyway. Includes 2 nickel plated brass keys per padlock. Twin pack. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov