The day you don't bring tools on the trail is the day you'll break down, so stick the Crank Brothers Multi-19 in your pack and you'll have everything you need for trailside repairs and adjustments. From loose bolts to broken chains, the M-19 will get you back rolling in no time thanks to a wide range of hex keys, screwdrivers, spoke wrenches, and an 8 - 12-speed compatible chain tool.