Hiplok Z LOK Bicycle Lock/Bike Lock/Bike Helmet Lock x 2 (Twin Pack) - Lime. Charity Edition (BBS). Lightweight Zip Tie, Steel Core, 400mm Area

Update: I was told not to bother sending them back, and a replacement pack was sent quickly. So I ended up with a spare. All 3 locks have worked really well, and these are great to carry since they are so light, and very quick to put on and take off when stopped. They prevent anyone simply walking off with the bike during a cafe stop or something; and do have a strong metal core which isn't quick to break through if anyone does try to do that.They are great, so from 1 star to 5, both for product, and service when one of the first pack didn't work as it should.One of the two has failed after only a few uses - it wouldn't lock at all but just kept sliding off. I haven't used the other. Will be sending both back as a faulty product.

Nifty little locks, not exactly high security but handy for coffee-stop helmet lock duty, or maybe holding the front brake on. Anything to slow an opportunist thief down. Carry a pair and you can lock both wheels of your bike to the frame, so the thief can't roll your bike away, unless they have an unlocking tool of course, then they'll be off with whatever in a jiffy. You pays your money and you take your chances.....

I was after a small lock that was visible, super lightweight and suitable for use outside coffee shops. This is the perfect lock. Granted it does not provide a very high level of security and could easily be cut by a criminal. However I don't need it for heavy security as I never stray far from my bike at a cafe. This folds nicely and fits perfectly in the back pockets of a jersey, it's super lightweight so doesn't weigh us road riders down. I ordered the yellow colour which is very visible on the bike hopefully further deterring a criminal. I would very much recommend to a rider who doesn't need a very secure lock, but wants something lightweight and simple as a small deterrent.

Great and light an small enough to put in jersey pocket.Buy two - you can then have option to link together as one isn't practicable enough to go through bike, and round any post. Two does job great.

Really like these for an additional lock on the bike. Small enough to pack away in the rucksack without taking up room, and great for quick trips out where you don't want to take the big lock with you. I wonder if the combination lock might be a better idea, as you do need to keep tabs of your key for this! They're sturdy and haven't failed me yet.

Use these to fasten my motorcycle helmet to my bike. Easy to use, lightweight and convenient to carry. I would not use these ties as primary restraint for an expensive bicycle - far too flimsy!!!Cons- would only deter a casual thief. These ties could be readily cut- universal key (the key has two sharp prongs and the ends can easily tear/pierce your pocket lining. This is an annoying design flaw)

These are ratchet zip straps with a universal 2 pin release key. Very light and I use them for low security applications. My motorcycle helmet is clipped to my rack with this, but I wouldn't wander away from my bike relying on this ruffty tufty zip strap. My soft bike paniers are clipped to my pannier frames with these. For a dirt bike tourist who will not carry more than 20kg all up in my bike these are a handy little security supplement. The inside is steel. I have tools in my dirt bike tool kit that would snip these but you have to accept these would be a minor irritant for someone going equipped to steal. These are very stiff but make a good, strong loop.

Wish I could give this one star. They simply don't work - if you lock something with one of these, you can simply wiggle the cable and it'll easily come undone with no key or tools necessary. I bought two, and they both had identical issues. I really wanted them to be useful for lightweight short-term (outside a shop for a minute etc) use, but they are truly pointless.