Material: 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 time Size: 14.5cm long, with flat design, it is lightweight and portable to carry and store without burden, taking up less space Easy 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 possible Significant 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 people Specification: Quantity: 1 pcs Size: 14.5cm long Color: Black Material: Carbon Steel Material