Bicycle Chain Wear Indicator, Chain Checker, Chain Measuring Ruler Steel Indicator Bicycle Repair Tool for Checking Mountain or Road BikeMaterial: The bike chain wear indicator is made of quality carbon steel material, which features good abrasion performance, not easy to wear and tear, sturdy and durable for using a long timeEasy to use: Insert the chain wear checker into the bike chain, if the (.75) end can not be inserted, the wear rate of the chain is normal and there is no need to replace it, if the (.75) end can be inserted, it is recommended to replace the new chain, and if the (1.0) end can be inserted, the chain must be replaced as soon as possibleSignificant cycling repair tool: The chain gauge measurement ruler can be applied as basic and important tool in daily life, helping you measure the wear rate of the chain to determine if a new chain is needed, which can effectively prevent accelerated wear of the flywheel.Application: The bike chain measurement tool can be applied for most types of bicycles, good helper in daily life, keep your bike running normally and bringing more convenience for most peopleColor: black and whiteSize: about 14*4.8CMDelivery Quantity: 2pcsWarm prompt:1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering.2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding3. Only the above package contents, excluding other products.