Designed to lock through the front discs or wheel, this robust shackle U-lock prevents a bike being wheeled away.Extremely robust body for maximum theft deterrence16mm hardened steel shackle with rubberised protective coatingDouble locking mechanism barWeatherproof key coverThe Bike-It Mammoth U-Lock - 16mm has a 16mm hardened steel shackle with a rubberised protective coating is designed to offer resistance from cutting attacks, while the anti-scratch covering helps protect your bikes finish.A great cost-effective way to deter the opportunist thief. For greater security levels use in conjunction with a lock and chain.