New York Fahgettaboudit Chain 1415. 14mm six-sided chain links made of 3t hardened manganese steel for ultimate strength. Durable, protective nylon cover with hook-n-loop fasteners to hold in place. Includes maximum security New York Disc Lock with 15mm MAX-Performance steel shackle. Patented*, oval hardened steel crossbar for extra security. Hardened double deadbolt locking for extensive holding power. High security disc-style cylinder with reinforced anti-drill, anti-pull protection system. Sliding dustcover protects and extends cylinder life. 3 stainless steel keys - one lighted with high intensity bulb and replaceable battery. Key Safe Program.