Now available in 3 NEW COLORS: grey, red, & purple. 7mm four-sided chain links made from 3T MANGANESE STEEL. New END LINK DESIGN secures chain to hardened deadbolt. Hardened DEADBOLT DESIGN provides extra holding power. HIGH SECURITY DISC-STYLE CYNLINDER is pick and drill resistant. Includes 2 NEW ERGONOMIC "I" KEYS. Durable WEATHER-RESISTANT nylon sleeve prevents scratches. Key Safe Program Kryptonite - Keeper 785 Integrated Chain Color Series