Wordlock Bike Lock Prism Security Level 1 Level 1 Basic, Prism Design 4 Letter key pad, Easy to remember. Great for little ones too. 5ft cable, 8mm thick. WordLock... Easy Set, Never Forget Security, creativity and usability come together in the original family of WordLock padlocks, bike locks, travel locks and cable locks. Traditional locks require keys or they make you remember confusing sequences of numbers. Those days are over, thanks to WordLock's advances in lock technology.