Every ’10 Best’ list needs an avant-garde choice, and for us it’s the Tuls Lucy Stainless Steel. This beautiful, credit-card sized tool started as a Kickstarter project and packs in a surprising amount of features for something designed to fit in your purse. Just remember that if you doubt your own hand-eye co-ordination, this won’t exactly be the easiest thing to use. Maybe better for carrying as an emergency measure, rather than as your go-to tool.

How to: Adjust your Brakes with Barrel Adjusters

It’s coming from the One Hundred store in the US, but shipping cost are surprisingly small. This also makes for a great gift!