Nite IzeBiner SlideLock Locking Stainless Steel Carabiner (Black, #2)

I brought these specifically for the slide lock, as I have the tendency to loose items when I hook onto my backpack. Traditional carabiners break easily. This Nite brand is top quality, a bit pricer but very reliable. I secured my travel neck pillow onto my backpack for the whole duration of my trip and it never came undone. I love the side lock which adds another layer of security. The size is a little large but is fine. I have also tested with my water bottle and it holds it well.

Small but really handy, well made too.

Brilliant. Its the locks on the springs that are clever and effective. Size difficult to gauge from the photos (should have looked at the tech spec) so got one slightly small (#2) and one (from another source) rather large (#4). Obviously I need a #3 to fit on my belt loop.

Very secure and lockable perfect for my rucksack. Worth the value in money.

Bought this as an extra measure of security on a backpack zipper. Works well and I'm sure that if someone decides to try and help themselves to my backpack contents I'll notice.

After ≈ two weeks of holding a water bottle to a bag (high use though well under the 10 lbs limit), the gates broke off. Before this, the gates did repeatedly lock on the wrong side of the bar which required fixing with brute force.I'd just get a normal carabiner.

Bought to attach to my sling to attach my cap to when not wearing it which it works well for. No more loosing caps in the pub! However since buying it for this I have found so many other uses for it. Just buy one and like me you will end up getting more.

I use this clip on my keys. The lock has keep the side with the keys secured whilst the other side easily clips onto my bag. The size is around the same as a smaller key