Is there a specific name to this keychain thingy? : r/whatisthisthing

What is this keychain sized item with a razor sort of like a letter opener, removable plastic cap with whistle like hole in it, and a button that slightly moves metal piece?

Black thing that can stretch the top part with the keychain thing : r/ whatisthisthing

What's this weird keychain thing? The dark rectangle inside is made of metal and has a sharp edge, sort of like a pencil sharpener's blade. There's a little curved piece of plastic

Weird looking key on my work keyring : r/whatisthisthing

What is this thing? Found on the ground at work. No obvious moving parts. : r/whatisthisthing

Wat is this keychain? : r/whatisthisthing

Metal thing came with car keys (second hand) : r/whatisthisthing

Name Keychain, Birthday Gift Custom Keyring, Your Name Keychain, Stainless Steel Keychain, Durable Metal Key Chain

Metal tube with a key ring, found at a retail location : r/whatisthisthing

Keychain thingy from an old bar : r/whatisthisthing

This was left on a keychain. Metal side isn't a magnet. : r/whatisthisthing

What is this thing on my mom's keychain that she has no memory of? Looks almost like a cell battery on the back. “D” where it looks like your thumb would press