Due to its traditional quality, Unior is popular with both professional and amateur craftsmen. A century of excellence for the next millennium Unior, the European hand tools producer, is a synonym for reliable, high-quality, and functionally designed hand tools around the world. - This chain tool can cover anything from 5 to 11 speed - Doubles in function as a valve core remover for schrader and presta valves - European made and lifetime warranty