ABUSABUS Hardened Steel 8KS 2 Foot 5/16" Thick Square Security Chain for Bikes, Containers, Trailers, ATV's, Motorcycles and Personal/Industrial Property

I use this to lock a storage yard filled with vehicles and tools. The chain and sheathing are high quality and don’t look to have any vulnerabilities. The chain links are heavy duty and have a nice finish.This definitely fits the bill for high security and performs very well. The chain is heavy due to the thickness of it. Definitely a good value for money.

Very heavy and well built chain with a protector cover for your gate. The trick is to push the last link through the other end of the last link; then put your lock on the link that you pushed through. Otherwise chain is too thick for any lock. Works like a charm.

Easy to maneuver, locks in place, built sturdily, and functions safely.Thank you!

I had my first ever road bike stolen and vowed it will never happen again.Previously, I had used one of the OnGuard U-locks (don't remember the model name/number because I purchased it 11 years ago), and it was nowhere to be found when I realized my bike was stolen. After I bought a new road bike, I did an extensive search of the major heavy-duty locks out there. What did I find? Numerous videos of these so-called super high-security Kryptonite U-locks costing $100+ getting picked in seconds or cut in minutes, not to mention videos of all kinds of cables getting cut like butter. Combination locks are laughable. There are all kinds of marketing gimmicks out there, including thin cables surrounded by a thick layer of rubber/plastic material and anti-theft protection (there is ONE account of a successful claim through the first 4 pages of google search but who knows if that is real; FYI, you need to submit the broken/compromised lock but most thieves take the lock with the bike).After spending days researching different combinations, here is the most secure combination I have found: A heavy duty chain + padlock that cannot be easily picked. Also, a digital U-lock as an added security measure.- Heavy duty chain: There is a video on YouTube that compares different chains. 12KS is the model that was tested in the video. It takes 4-5 minutes in ideal conditions (flat on the ground, allowing a thief to use his/her entire body weight) to cut using a giant bolt cutter. I can't imagine anyone being able to cut this with a bolt cutter if it is several inches off the ground.- Padlock: Again, a quick YouTube search will reveal how easily some of these can be picked. I won't endorse any particular company, but get one that has multiple discs and is not susceptible to hacking with a bump key. The best ones appear to cost $100+.- Digital U-Lock: The concept of keyless, digital locks with thick shackles is promising. There are several different startup companies competing for the next big market. Most of them are shipping their products around September, so we will see how easy/difficult it will be to hack these.PROS:- Very, very tough- Short (makes it more difficult for thieves to maneuver)- The two squares at the ends interlock so that you can use a padlock with a very thick shackleCONS:- Heavy. 4 lbs.- Limited versatility because it is only 2'. Wish they sold a 3' one.OVERALL: Highly recommended, especially for those in SF and NYC.

Pros- Stong. Very strong. Strong like bull. Fits together well. Nylon cover is very well thought out and useful. Pairs perfectly with an Abus Granit lock. Did I mention its strong?Cons- One end link is designed to have the other fed through it for locking, as such it will only loop to one diameter without modification (i.e. cutting off loops). Cutting off loops will probably require you to get a torch or to burn through a few cutting discs. Due to the large links this chain is not very... "flexible" for lack of a better term. If you have to fit it into a tight space your gonna have a bad time.This chain came with an Abus lock I recently ordered. It is a very substantial chain that weighs about 3.5 lbs per foot. The cover may not seem necessary, but once you put it onto something you will see that it very much serves a purpose and you will be glad to have it. This chain could leave some serious marks on even a powder coated surface if you were to drag it across. One loop on the end is longer than the other- this is so you can feed the small link through the larger one, giving you more options for locking. This will be the only way you can lock it if you are using a Abus Granit lock. The links are very large, made of hardened square steel stock, appear to have an anodized coating on them. They are welded very well at the gap in the link. If you need a very strong chain to secure something of high value this is a great choice. I highly recommend it and will be buying more.

I am impressed with how sturdy this is. I didn't read careful so it's shorter than I expected, and I won't be able to use it to lock up my scooter as I'd hoped. Going to use it for the fence instead.It's a little tricky locking it up, you need to use a lock with a relatively thin hook part. The big chunky super locks won't fit.

The size of the links are impressive and should make it hard for a potential thief to cut through. I also had a special lock that did not have a curved top and found that one end of the chain has a larger link then the other, allowing one to fit through the other so you can use locks without curved tops (which can be cut easily). Most importantly was the 10 foot length. I was able to go through the front and rear tires of TWO bikes and still have enough to attach to a bike rack (or travel trailer tire or tongue). And best of all, the chain is wrapped in a nice cloth which protects my e-bike's paint job. Note that the chain is heavy to carry around (around 5 pounds) but to me the protection and length are worth it. I highly recommend this chain. I have had the chain for many months now and I haven't noticed any rusting or problems.

Very well built chain, I am protecting $2000+ Lectric e-bikes at Sun Life resort in Mesa AZ. We are sitting ducks here with many thefts in the resort and throughout Mesa. I use Nestling locks and use Ring cam for video surveillance, Also have WSD CAM audio alarms on the bikes(very loud). Plan to add Air tags. All items from Amazon! Love Amazon!