Ultra 410 CombinationA BIKE LOCK AS STABLE AS A FORTRESS There is no way around this U lock. The Ultra 410 shows how security works in ABUS quality. If you don't want to leave anything to chance when protecting your bike, our Ultra 410 is the best choice. Its solid shackle made of hardened special steel, with a diameter of twelve millimetres, withstands many brutal attacks. The solid lock body is also made of steel and contributes to the protection of your bike with its