Multi-tools definitely are useful, but not everyone likes jamming the things down into a pocket. That's not a problem with the titanium-bodied K-Smart, since it doubles as a clip-on chainring which can be quickly removed as needed.
Metperial survivalist multi-tool and pocket clip key holder by Ice, Myark, Casper and Denis Stewart — Kickstarter
Tiny 14-in-1 Titanium Key Multitool Is More Versatile Than A Swiss Army Knife - Yanko Design
Titanium keychain tool,Lightweight Multipurpose Tool, Paint Can Opener, Pry Tools, Wrench Bottle Opener,Ideal Every Day Carry for Men
Titanium multi-tool adds extra functionality to the humble keychain
Titanium multi-tool adds extra functionality to the humble keychain
The Ultimate 11-in-1 Titanium Multi-Function Keychain by Ideaspark — Kickstarter
Titanium multi-tool adds extra functionality to the humble keychain
Popular titanium multi-tool gets lighter and better
Closs Industries Closs 8 in 1 Titanium Multitool Keychain- Bottle Open
Closs Industries Closs 8 in 1 Titanium Multitool Keychain- Bottle Open
Tiny 14-in-1 Titanium Key Multitool Is More Versatile Than A Swiss Army Knife - Yanko Design
Functional Keychains Designer Fashion
Titanium Multi-Tool Key