【Wear-resistant】Our bicycle chain checker is durable, wear-resistant, long-lasting, and has a more refined appearance. This bicycle chain checker tool is made of aluminum alloy. 【Check Wear】This tool will quickly check the chain stretch and wear to determine the quality of the chain. You can quickly and accurately check the wear of any chain. 【to carry】 Small and lightweight, the chain wear indicator is a portable maintenance tool for cycling enthusiasts, easy to carry and can be used in hand luggage. 【and practical】 The chain wear indicator is easy to use, just insert the chain wear indicator into two cables, lightly press the rocker gauge, and check that the meter reading is accurate. 【of application】 The bicycle chain measuring ruler is compatible with 8-12 speed bicycle chains, used to detect the length and angle of the chain, easy to use and carry, practical and convenient.