Nite Ize Unisex's S-Biner Stainless Steel Slide Lock, Black, Size 4

Brilliant clips with locks to ensure that they don’t accidentally open. I have loads of these in different sizes and they are all very useful and last ages. Easy to use and look good.

Very good, the little safety lock feature gives you confidence it will not loose your keys etc. Will likely buy another soon

This has quickly become a small piece of gear that I use every single day, makes clipping and unclipping items incredibly quick and convenient with the comfort of knowing it's more secure than a standard carabiner.

Good sized carabiner and seems secure and well-made. Very useful for attaching a hat or an umbrella to a sling bag or rucksack. As someone else commented, it is possible to lose the little locking bands if you're not careful but the carabiner would still work without them.

These are great, strong, robust and very easy to use. I bought it to fasten my sons water bottle on to his school bag when he started reception and its great. Holds well, copes with rough treatment without a problem but still easy for him to open.

Fantastic product. I use it to ‘lock’ the two zips on my backpack - it stops the bag opening and a small deterrent to pickpockets.

Very well made & sturdy. Wanted something to make zip on handbag more secure against pickpockets on city break. Will also obviously be useful for attaching shopping bags etc. Even matches the colours of my bag! Quick delivery.

I like it. It it’s too expensive for what it is.