Utility ring will serve all your multi-purpose needs
Ah, yes. Everything should be compact. Including utility tools. This is one nifty ring crafted from aerospace grade titanium that packs a wallop: it comes with a bottle opener, a straight blade for cutting straight-forward stuff, a serrated blade for cutting tougher things, a saw for cutting plastic and wood… and it even has a tiny comb. The fact that all these tools are extra small makes it sound like it’s a bit of a joke. But you never know when you might need one.