A simple, unobtrusive multi-tool that is hard-wearing and constructed to get you back in the saddle quickly. Specialist bike-tool manufacturer Birzman is relatively new on the UK scene, but their product range is impressive, from hefty spanner sets for the workshop to little mini-tools for emergency side-of-the-road repairs. And it's the latter type we're testing here: the simplest of the mini-tools, with just five basic functions - three Allen keys (4, 5, 6mm), a Torx tool (t25), and a cross-head screwdriver.