OKG Ultra Security Chain - 4ft x 1/2in (12mm) Thick Hardened Alloy Steel Cut Proof Chain - Anti-Theft Heavy Duty Chain for Motorcycles, E-Cargo Bikes, Trailers, Gate Fences, and Garage Security

You could anchor the Titanic with these chains.. Geezoo.. they are tough like that bully in the 6th grade. Except, these chains stay tough. I use them outside in the summer heat and winter rain, makes no difference. There is zero "give" in these chains. They will stay put, just like the thing you chained them to.

WE have looked at and tried many different chains to secure a golf cart. I must say this one had to be one of the best options. Solid sturdy quality. You can immediately tell this is not your typical bike shop quality chain by the weight and quality of the welds. I love the Cinch Ring. Honestly cant find anything negative to say about this chain and as a matter of fact, will be ordering another one soon

This chain lock is very very heavy. It works for me because I have an ebike + rear rack & milk crate so I can just throw it in there. But I would not want to use this for any other bike, even for an ebike without carrying capacity. It's very intimidating, thick, and bulky. Could still be angle grinded so best to pair with a different chain lock or another U-lock. This chain would be best secured with a small U-lock or closed shackle lock. Do your math. Did not fit in my Squire CP50 so had to return that.

QUALITY OF CHAIN IS GOOD. MY ONLY PROBLEM IS THAT AMAZON SAYING THEY GAVE IT TO A JOE AND THE BUILDING NEXT DOOR WHERE IT WAS DELIVERED IS A CLOSED BUILDING

I have this on my carport chaining my bike down and it’s heavy duty and weighs a decent amount have to had any issues other then I wish it was a little longer but it works great easy to use and fits perfectly worth the money for me

Although this chain appears similar to other well-known brands on the market and the description indicates the "Sold Secure Gold" approval in 2020 for bicycles, I have confirmed with a Sold Secure representative that OKG has not kept up with the required annual renewals to maintain their products' security ratings. This makes me wonder whether the theft-deterrence level is still the same as four years ago, or has the material and/or manufacturing quality cheapened since then.

Item as described. Will see if it protects my bike.

I bought one, bought a second, and would buy a third if necessary. Big. Heavy. Chain. Squared hardened links prevent theft from everything but a grinder.

Very heavy chain for sure cannot be cut by anything, I've requested a return on mine only because I'm 73 and it's too heavy for me to use.

This lock is absolutely cut proof. It's 8 lb of Steel. I also found out that if you wrap your locks closely to your bike and to the tree or Pole where there's no space in between makes it very difficult for someone to steal it. I am very happy with this purchase!

Purchased this one for my partners bike. I have the same for mine and it is solid and even in high theft areas no one can get through this chain…well worth the money.

So ive owned quite a few security chains over the years from kryptonite forgetaboutit chains to pegaw security chains and this is in the top tier in terms of quality and value. This security chain has all the features, boron hardened steel with manganese coating(anti rust) and includes the typical soft sleeve to protect the paint on your toy. While i dont think the sleeve is typical kevlar which cloggs up cutting disks, it does offer a good amount of effort to remove since most thieves wouldnt try to cut it off before trying to cut it with a cutoff tool. The links themselves are hexagon shape, not square or circle and this gives the chain a larger surface area to deal with the forces of bolt cutters. While any chain is not impenetrable it will however give them a hard time and wont be able to cut it unless they carry a 36 inch set of bolt cutters around with them(highly unlikely). A traditional set of bolt cutters has zero chance against this chain. Overall its a great security chain, high quality and super strong. As with anything, you can never stop a dedicated thief so everything is merely a deterrent and its your job to make it as hard as possible for someone. Its all you can do. Anyone curious, they make the chains short because when your toy is locked up against something tight, it makes it harder for a thief to access it with a big set of tools since your toy is practically leaning against the wall/pole ect.

I would never call a bike chain "unbreakable", but this one is very close to that description. It would take an incredible, obscene amount of effort to cut through these, which means that the lock you decide to pair this up with better be as strong! The chain itself isn't rounded, but instead a hexagonal shape, which is ideal if you want to prevent bolt-cutters from getting to them easily. Around the chain is a fabric sleeve, which is great for protecting the paint on your ride. The cover is listed as Nylon and it can be removed for cleaning. The chain is thick - around the thickness of a finger - and it's got some weight to it. This may not be a problem if you have a cargo basket or paniers on your ride, but if you only carry a backpack then you will need to use caution as this much weight will shift your center of gravity. The length works great for my electric scooter, but think this would work just fine with most bikes too. Overall, the confidence boost when using this chain to lock up my ride is 10/10. I no longer worry about the chain being broken, but now I have to find a lock to match this level of security!