This is an absolute find for any cyclist. This repair tool will come in handy and it's the perfect size for a bike bag or rucksack. Every Allen/Hex Key you can imagine, three Sockets, a Philips, a Flat head, a Square head and a Hex wrench. It's mainly steel so it has a bit of weight to it. Feels like it'll last forever. Everything folds away into one neat package that is about the size of a small Hamster or a really big Mouse.