weight bearing carbine with like man 20 basic ring with all kinds of keys and do dads and such attached. so like common door, front door, mailbox, bike lock. one has a can opener. oh storage key. just tons.

Small load-bearing carabineer, with categorized keys on their own ring. Car keys, house keys, safes, bikes. Just grab the keys you need and go.

Transportation keys (car or bike locks) are each on their own key ring and I take the one I need. All the rest go in my wallet.

Just a plain ring to minimize the size in my pocketses.

A little key wallet, keeps the keys from jingling when I walk.

Still just the default one.

I like how everyone’s answering another question, like OP asked “What do you keep on your keychain besides your keys?” Because none of those things would hold keys. The hole’s too small.

Now, like, the guys saying carabiner clip, you couldn’t put keys on something like that, but you could put one on your keychain so you could clip it to your belt. Useful if you want to keep your keys from scratching something in your pocket, I suppose. Also keeps your pockets less cluttered.

I’ve got three right in front of me. A fourth one is on my AirPods case. So yeah, definitely have them.

a short length of bicycle chain

A wire with a screw. Like the aviation industry.

Titanium multipurpose carabiner, ruler, wrench, bottle opener, flathead screwdriver. Handy for like $5 a decade ago.

A quick release keychain, it releases from a simple multi purpose carabineer. (Yes I know - the carabineer function is for my belt loop, the quick release is really what it is named for)

I’ve had the same carabineer for what feels like forever now.

My new place uses an electronic keypad entry and my car only has a fob, so all that’s on my keychain is my car fob and a little cute catbus guy because it was a gift and it’s super cute

I only have a bottle opener, and I only have it because my beer distributor didn’t sell any other kind of bottle opener.

Carabiner on a belt loop

Big chunky carabiner. Also it’s green.