3PS,Bicycles Chain Wear Indicators Checker Cycling Chain Gauge Measurement Ruler Road Bike Chain Repair Tool EnduringBrand:Entersports Does this product have a safety warning:Yes Safety warning content:WARNING: TO AVOID DANGER OF SUFFOCATION, KEEP THIS PLASTIC BAG AWAY FROM BABIES AND CHILDREN Item identifier:1366505514953942-2083789480869078 Product Description It can quickly detect chain wear and can used on almost any bicycles, such as city bikes, mountain bikes, road bikes. The circulating chain inspector is a good tool for checking the degree of chain wear. The chain hook designs allows you to easily handle chain maintenance. The bicycles chain gauge is make of Aluminum alloy, which can used for long terms and rustproof. Portable, easy to store, and not occupy too much space. Easy to operate with single hand. Bicycles Chain Wear Indicators Checker Cycling Chain Gauge Measurement Ruler Road Bike Chain Repair Tool Enduring Features: The bicycles chain gauge is make of Aluminum alloy, which can used for long terms and rustproof. It can quickly detect chain wear and can used on almost any bicycles, such as city bikes, mountain bikes, road bikes. The circulating chain inspector is a good tool for checking the degree of chain wear. Portable, easy to store, and not occupy too much space. Easy to operate with single hand. The chain hook designs allows you to easily handle chain maintenance. Specifications: Materials: Aluminum alloy Package Includes: 3Pc Bicycles Chain Gauge Note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.