U-Lock Max security Sold Secure Diamond Bicycle rating Sold Secure Gold Motorcycle rating Maximum Security U-Lock U-locks are the most widely used bicycle security solution. However you enjoy your bike, our new Maximum Security U-lock is both convenient and secure.Constructed from ultra hardened steel and with heavy duty 4 point locking technology, they are designed to resist all forms of attack, with a longer shackle making it easier to lock to solid objects. They are independently tested achieving a Sold Secure Gold rating and carry a lifetime guarantee.They combine over 175 years as one of the best-known and most respected names in the industry with cutting edge locking technology. Additional usability features include a double rubber coating to protect paint and internals and 4 laser cut keys (including 1 with micro-light). For peace of mind, protect your bike with Yale. Features Lock type Key Cover material Rubber Base material Steel Housing material Steel Product colour Black Sui