Bike Chain Tool + Chain Checker, Oumers 2-in-1 Universal Bicycle Chain Repair Tool/Bike Chain Splitter Cutter Breaker Chain Wear Indicator Tool/Bike Maintenance Fit 7 8 9 10 Speed Chain Link Specifications: 1.Bike Chain Tool: Designed to quickly and accurately remove and install chain pins. 2. Bike Chain Wear Indicator Tool: A worn chain shifts poorly and wears sprockets at an accelerated rate. Bike chain wear indicator tool lets you know when to replace that stretched chain to increase cassette and chainring life. This bike tool has indicator marks between 0.75% and 1%, (the points at which chain experts suggest replacement). Package info: 1* Bike Chain Repair Tool 1* Bike Chain Checker Oumers Multi-Function Bike Bicycle Cycling Mechanic Repair Kit/Bike Tool with 3pc Tire Lever 5pc Tyre Patches/Tire Rasp/Work Bag Packing Info: 1* 16 in 1 multi-function bike tools 3* ultra high strength tire levers 5* different size tyre patches 1* metal tire rasp 1* portable black workbag About 16 in 1 Multi-Function Bike Tools: Socket hex wrench 8/9/10/mm/ Slotted screwdriver/ Phillips screwdriver/ Sleeve extension rod Flat wrench 8/10/15/mm/ Spoke wrench/14GE/ Inner hex key wrench 2/2.5/3/4/5/6mm Why Oumers: Oumers INC. mainly engaged in the development and export of products with high quality, stylish design. Oumers has always adhered to ” High quality products , good customer experience” business purposes. Committed to providing you with high-quality products and quality services.Notice: Further if you have any questions or problems, please contact us directly for help at anytime. we will do our best to help until it is fully resolved 100% satisfaction Service – We offer 30 days money back guarantee and 1 year warranty.