01 Bike Chain Measuring Ruler - Durable & Lightweight Bicycle Chain Wear Indicator Tool for Outdoor Cycling & Maintenance | Perfect for Mountain Bikes, Road Bikes & DIY Bike Repair

Feature:1. It is a useful tool for measuring the degree of chain wear, and it is convenient to determine whether the chain needs to be replaced.2. No burrs, and the scale parameters are not easy to decolor and peel, and are more durable.3. Made of high‑quality sturdy stainless steel, so it is durable enough for long time use.4. Easy to use, without any difficult requirements even though you use it for the first time.5. The metal material is polished, thin and durable. An essential accessories for riding.How to Use:The size parameters of 0.75 and 1.0 mean that each 11‑knot stretch chain is 0.75mm and 1.0mm.Size: The chain will be worn after a long ride. If the ruler cannot be inserted in 0.75 and 1 size, it means that the chain is working properly. If it can be inserted in 1.0 size, it means that the chain needs to be replaced. 0.75 means it is recommended to replace the bicycle chain.Specification:Item Type: Chain Measuring RulerMaterial: Stainless SteelProduct Size: Approx. 141 x 47mm / 5.6 x 1.9inWeight: Approx. 38g / 1.3ozDetection Chain: Odd Number 6 / 7 / 8 / 9 / 10 Package List:1 x Measurer