Features:_x000D_Package: A set of 10pcs female and male skating screws for inlines skating wheels_x000D_Size: 31mm skating screw is the perfect replacement for the front wheel. 36mm skating screw is the perfect replacement for the rear wheel and brake-bolt_x000D_Material: Made of quality iron with coating on the connecting part, it is sturdy, sturdy and not easy to loosen_x000D_Easy to install. Only suitable for skating shoes required the male and female screw fittings on the wheel_x000D_Needed two 4mm hex key on double ends for installing. One hex key for fixation and another tool for doing the work_x000D_Notice:_x000D_1.Actual color may be slightly different from the image due to different light effect_x000D_2.Please allow 1-3cm deviation due to manual measurement_x000D_ Material: Iron_x000D_Middle part length: 31mm_x000D_Middle part outer diameter: about 6mm_x000D_Top hexagonal sleeve diameter: 4mmPackage List:_x000D_10Pcs Inlines Skate-Axle Screws Replacement