Nite Ize - LSB4-01-R3 LSB4-11-R3 S-Biner Slide Lock Carabiner, Black, #4

Nifty little thing. I don’t think I’ve ever used the word nifty before. I hooked one side to a fannypack and the other to a water bottle. Not fashionable but very helpful

I use this for my daily keys to go everywhere. Simply hook it onto my belt loops and I havent had any issues since. The locking feature is great so I can lock the entry so the keys can never pop out accidentally. Great purchase and I bought a few more too.

Marginal as a biner clip, the lock is worthless. Plan on losing keys.

Great quality

The most confusing part about these carabiners is figuring out their size. Nite Ize could have posted a table of their dimensions instead of comparison of size with different objects. Anyhow, the number associated with the part (in this case, #4), as far as I figured out from the internet sources, it is (approximately?) equal to rounded to a whole number height of the carabiner in inches. Of course, it sizing is most likely based on metric values, so any correlation to size in inches is accidental. Anyhow, #4 measures 3.5 / 90 mm in height, and it is the width of the palm of my hand. My intended use is to hang my jacket and bag on pickleball court. S-biners work much better for this purpose than standard carabiners - they are very easy to clip to the fence and to clip the bag to them. For the jacket, it is a perfect size, for the bag, with its wider handle, I ordered a larger size. For a water bottle, it may also be a little too small - the next size up might work better.

Works well

This key carabiner is stylish as well as utilitarian, no longer am I worried my keys will fall off!

doesnt always stay closed. make sure you use the locking mechanism.

I have been using these for almost 10 years. Eventually (after a couple years) the locks get loose and I have to get a new one so I dont lose my keys. Takes long enough that Im not upset about it.

They are perfect for my golf bag