Chain Wear Indicator, Rustproof And Durable Bicycle Chain Gauge Bicycle Repair Tool Accessory PREMIUM MATERIAL: The bicycle chain wear indicator is made of good quality carbon steel, sturdy, rustproof and durable, long maintenance time. DUAL MEASUREMENTLY DESIGN: The chain wear indicator has a double size design of "0.75" and "1.0", which can determine if the chain needs to be replaced. PRACTICAL BICYCLE TOOL: The bike chain wear indicator tool can help prevent the breakage of worn chains and is a very handy tool for bicycle maintenance. APPLICATION: Bike chain gauge is suitable for all kinds of single speed / 6/7/8/9/10 bicycles. An indispensable tool for bicycle lovers. Colour: Black Size: 14*4.8cm Quantity: 1pc Kind tips: 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 understanding. 3. Only the above package contents, excluding other products.