Troika redefines pencil technology with the Construction Endless Pencil, now in a super-handy keyring form.

This pencil does not require sharpening and the lead is unbreakable. The Troika Construction Endless pencil features a permanent HB writing tip which is capable of writing in a straight line for up to 12.5miles(20 km) continuously. The HB hardness tip is also replaceable for when it does eventually run out. Each Troika Endless pencil has a six sided aluminum barrel with the Troika Construction design with a centimetre/inch ruler, though in this tiny version, only suitable for measuring very small things.

This keyring version makes a perfect handy little pencil you'll always have with you, and that can stand up to all the rough treatment it can get in a pocket, adding only a few grams of weight to your keys.. Unscrews for use, so you don't have to write with your keys in your hand, though it's very small, so probably best for emergency use!