Wheel building and maintenance is a complicated art, and a spoke wrench is an integral part of it. Feedback Sports doesn't try to do anything complicated with its Spoke Wrench. The durable, CNC-machined tool comes with slightly rounded edges to give you a secure grip as you painstakingly adjust again and again, and the end of the wrench also works as a valve extender if needed. Whether you're a longtime pro or an eager beginner, the Spoke Wrench will help you keep your wheels trued for years to come.4-in-1: 3 spoke nipple tools and 1 valve extender tool3.23mm (0.127") slot fits many DT Swiss, Marwi, Edco and Wheelsmith square nipples3.3mm (0.130") slot fits 15G square nipples3.45mm (0.136") slot fits 14G square nipplesFits the 5mm standard for valve extenders on long-valve presta inner tubes and tubeless presta valve wheelsHardened CRV tool steel maintains precision edges for a lifetimeFound in our Ride Prep and Team Edition Tool KitsLimited Lifetime Warranty