RideLock U-Pocket High Security, Heavy Duty U Bike Lock Shackle - Small Dual Bolt Key Entry Bicycle Lock + 12MM Hardened Steel & 8MM Tough Silicone [Black] HIGH SECURITY - The RideLock heavy duty, hardened high grade steel bike lock will deter thieves with just a glance. It's small, compact size not only makes it essentially impossible for thieves to pry open but also means it is light and easy to carry. U LOCK - Known very well by thieves for its incredibly robust design, they are always going to pass up your U-locked bicycle in favor of a much easier to get chain or cable locked bike. Even if they did try, the dual bolt locking mechanism makes this lock far more secure than a standard single bolt U lock. KEY ENTRY - Generally regarded as the more secure option compared to a combination lock, the keyed lock is an added measure of protection. You are provided with two keys, if you lose one we strongly advise getting a copy made of the remaining key. DURABLE PROTECTION - You can carry the RideLock anywhere on your bike without fear of it banging against and damaging your paint job thanks to the thick, tough layer of silicone that can withstand the harshest conditions. It already stops thieves, it may as well prevent chips and scratches on your baby too. 100% MONEY BACK GUARANTEE - If for any reason you feel the RideLock just isn't what you were looking for in your first 30 days of ownership, we will happily allow you to return it for a full refund.