High Quality MaterialThe surface of the chain inspection tool has a matte texture, even if there is oil on the chain gauge, it will not affect normal use and can effectively prevent slipping. An excellent bicycle chain wear indicator tool can ensure your comfort and efficiency during the measurement process. Multifunctional DesignBicycle chain inspection tool It can not only test the wear degree of the bicycle, but also measure the diameter of the screw. The round holes of different sizes can measure M3, M4, M5, M6, M8, M10 screws, and the length of the screws can also be measured with a scale. Our chain wear checker can meet your different needs and provide convenience for your work. Easy to UseAll you need to do is insert the bike chain checker into the bike chain. If the 0.75% end cannot be inserted, the chain is normal and does not need to be replaced. If the caliper hits 0.75 percent, it needs to be careful, and when it hits 1.0 percent, the chain needs to be replaced quickly. The two hooks on the top of the bike chain checker can hold the chain during assembly. You can easily check the wear of the chain. WIDE APPLICATIONThe size of this bike chain wear checker is 12.5*4.3cm/4.92*1.69in. It can be used on various styles and models of bicycles, including regular bicycles, mountain bikes and more. Not only that, but it's lightweight, easy to carry and store, and takes up very little space in your toolbox. Take it with you wherever you go.