Force Profi chain gauge with hook

Chain maintenance is key to the smooth and safe performance of your bike. The universal chain wear gauge with hook helps you monitor the condition of your chain and replace worn links in time for optimum performance. The gauge has two indications "OK" means the chain is still in good condition but needs to be replaced at 75% wear, and "NEGATIVE" indicates that the chain is completely worn and should be replaced. Thanks to the mounting hook, you can easily hold the chain while riveting, which simplifies maintenance and extends the life of your chain.