[Functionality]:This wheel alignment gauge is designed to measure whether the wheel rim is located at the center of the hub.It's an essential tool for maintaining and adjusting your bicycle wheels,suitable for road bikes,mountain bikes,etc [Material Durability]:Made from quality aluminum alloy and stainless steel with a nylon slider,this alignment dishing tool is sturdy and premium [Design]:The measuring rod of the bicycle professional wheel alignment gauge dish dishing tool features a 0 loop for proper positioning.The movable nylon slider allows easy for operation even with the tire on [ for Dimensions]:With a size of 68 cmx5 cmx2.2 cm/26.77 inch x 1.97 inch x 0.87 inch,this professional wheel alignment gauge is compact and portable,making it easy to carry around during your cycling adventures or store when not in use [Package Includes]:Each package comes with 1 Bicycle Wheel Centering Gauge Tool.Please note that it can also be used without the slider but requires removing the tire from the wheel