Quickly and accurately determine the wear and stretch of any chain with the Chain Checker. Simply insert the Chain Checker's pins into two links Top highlights · Compatible with all chains. · Simple operation and high efficiency. · A worn chain shifts poorly and wears sprockets at an accelerated rate Callipe Bicycle Chain Checker Measurement Tool Heavy Duty Aluminum Alloy Mtb Mountain Road Bike Chain Wear Indicator Gauge Measuring Ruler Tools 2e010bb8 9b9c 47b4 B855 665a36b53d47.703dfe8f2f2e754e5a60653f0170f97a Measurement method: If the two ends of the chain checker cannot be put into the chain gap at the same time, the chain elongation is within the normal range. It is a useful tool for quickly measuring the chain wearing degree, convenient for you to make a replacement. All issues will be solved within 24 hours. Lebycle Mountain Road Bike Chain Wear Indicator Tool Multifunctional Links Checker Gauge Measurement Simple operation and high efficiency. 100% Customer Satisfaction Guarantee and friendly customer service. Gauge Measurement Repair Tool Ruler Mountain Road Chains Gauge Measurement Ruler On the contrary, it means that the chain has been overstretched and needs to be replaced. As a chain hook for easy to deal with chai Compatible with all chains.