The Whites Valve Stem Seal Install Tool Set provides three common sizes (4.0mm, 4.5mm, 5.0mm) for use on most modern street bikes and one additional 5.0mm specially designed for Suzuki Hayabusa and other Suzuki models that use the same seal. The set is constructed with anodized aluminium handles & stainless steel pilot shafts, all provided in a convenient durable case.