This keychain pen fixes that problem forever. And get this: it writes with titanium, meaning it writes on any surface and is inkless, smudge-free, and capable of writing underwater — because you ...

【Quality & Sturdy】This carabiner keychain is made of titanium alloy material, non-corrosive, oil resistance, non-metallic smell, 4 times strength of stainless steel but ultra light weight for ED ...

it's small enough to fit on a keychain or belt loop, and it turns on as soon as you yank it from its magnetic base. Available in titanium or brass via a Kickstarter crowdfunding campaign ...