This is the Park Tool SCW-13 13mm Cone Wrench. The standard of the industry, Park Tool Shop Cone Wrenches are unmatched in quality and performance. The special "Y" head design puts more material where it's needed for strength and durability. Precision sizing and a military grade industrial phosphate finish ensure an accurate fit and consistent quality. Features: 13mm cone wrench Long, vinyl dipped handle for leverage and comfortable use Thin enough to use on the narrowest of adjusting cones