Park Tool PT-09 Shop Cone Wrench 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 Thin enough to use on the narrowest of adjusting cones, the SCW Shop Cone Wrenches have a long, vinyl dipped handle for leverage and comfortable use Sizes 13mm to 20mm, SCW-13 through SCW-20