This is a small part of the THB001 Hub Service Tool which is compatible with all Chris King hubs except the R45, 15mmLD, 20mm and 24mm. Note: Chris King has excellent technical information posted for hub service. Fast, reliable shipping to the U.S. and worldwide along with outstanding customer service make AVT the best source for Chris King precision bike components. A wealth of other information is available on the Chris King website. We guarantee to you that each Chris King bicycle component you buy from us is absolutely brand new with full warranty, and that we are an authorized Chris King dealer. American made in USA (U.S.A.)