A CO2 inflator and full-featured mini tool in one! Serfas' ST-17i features 2, 4, 5, 6 and 8mm Allen keys. It also has Phillips and flathead screwdrivers, T25 and T30 Torx wrenches, and 3.23, 3.3, 3.45, 3.96mm spoke wrenches. In addition, it boasts a 10mm open end wrench, a chain breaker and a CO2 inflator head (cartridges sold separately). With all that, this small tool's capabilities are hardly mini.