Featuring a simple, strong and aggressive design, the Ultra 410 is the ideal entry level u-lock. Its simple design conceals a number of high-tech advancements in security. The 12mm double-bolting temper hardened steel shackle extends all the way through the lock body providing excellent protection against cutting and torsion attacks in a simple yet innovative design. The Ultra 410 uses a very easy to mount, rattle free SH bracket. This lock offers good protection at medium theft risk. The hardened 12 mm round shackle and the shackle, body, and structural parts of the locking mechanism are made of specially hardened steel. The special, modern design of the lock body casing allows for optimum handling and the high-quality locking cylinder provides a high level of protection against tampering, e.g. picking. Millions of bikes are stolen every year, and police statistics show that only about ten percent of these cases are solved. This lock is a great choice to protect your bike.