Multi Function Complete Tools: The kit contains a bike master link pliers, bike wear indicator chain checker, chain breaker splitter tool, and 3 pairs of missing link connectors for 6/7/8/9/10 speed chains. Bike Link Pliers: This tool serves as a chain master link remover and connector, compatible with all chains and connectors. The anti-slip handles and middle spring provide better control and ease of use. Bike Chain Breaker Splitter with Chain Hook: The chain breaker is designed to remove and install pins for replacing worn chains. The included iron hook helps hold the chain securely during operation. Bike Chain Checker: Allows you to measure chain wear at any time. If the 0.75 or 1.0 mark fits through the chain, the chain is worn and should be replaced immediately. Bicycle Missing Link: These connectors are ideal for temporary use or on-the-go repairs when a chain breaks during a ride. They are reusable and easy to assemble and disassemble. Type: Multifunction Tools Bike Chain Wear Indicator: Repair Tool Cycling Bicycle Accessories: Cycling Chain Checker Kit Bike Chain Wear Indicators: Bike Chain Wear Indicator Tools Chain Checker Kits: Gauge Checker Color: Black Material: Stainless Steel + ABS Size: 16.8 x 6 x 2 cm Package Contents: 1 x Pliers 1 x Chain Cutter 1 x Checker 6 x Buckle Note: Lighting and monitor settings may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.