Kryptonite 1016 Evolution 9.7 lb Heavy Duty Bike Lock Chain - 5.25 ft 10mm Steel Security Chain with Keys for Bicycles, E-Bikes, Motorcycles & Scooters | Theft Protection for Urban Commuting & Outdoor Adventures

If you are buying this, you know what you are getting into. It's huge and bulky but sturdy and almost indestructible. The pick resistant lock is a little funky but it makes sense. I live in a big city and I ride a somewhat expensive hardtail that I can't afford to replace and can't live without. This lock keeps it safe.Do know that it is huge and heavy. It's awkward to transport and store while riding. It's a trade-off, though, as if you want a lock like this, you know what you are getting into. If you can't deal with a thick 12lb chain, get a smaller lock.As far as value, it is indeed just an industrial chain (not unlike the ones you would use to tether a boat or something to a truck as a backup) in a sleeve with a lock attached. So the overall cost seems a bit inflated but it does come with a good warranty, a good protection plan, and it does its job.