Already had one of these super strong, motion alarm U-locks from a recent purchase. I bought it to help protect my e-bike. I was so impressed with it that I ordered a second one for a friend who owns an equally expensive e-bike. His opinion of the EnzZone U-lock is just as positive as mine. With a 16mm shank and loud motion alarm (which can be deactivated if not needed), the price for this lock is less than others of lower quality.