A lockring tool and 15mm wrench let the Trixie fulfill the needs of riders with a simple commuter bike. It attaches to frame braze ons with wing nuts for quick and easy removal and installation. At 7. 4 inches in length, and sporting an ergonomic shape, the Trixie Tool provides excellent leverage for loosening stubborn cogs. Additionally, there's a 5mm hex and 8, 9, 10, and 15mm box end wrenches to cover just about any repairs a fixed or single speed bike will need for field service. Pedro's Trixie Tool is made from 5mm thick heat treated tool steel for strength and long lasting performance. In fact Pedro's covers the Trixie with a lifetime warranty, and even built in a bottle opener for post ride recovery.