Multi Function, Chain Removal Tool --- The bike chain tool contains a bike quick link pliers, chain checker tool, bike chain splitter and 3 pairs of missing link connectors for 6/7/8/9/10 speed chain. Made by superior durable material and perfect match for all your bike chain repairs. Bike Link Pliers --- It is master chain link removal and connector that works for all chains and connectors. The anti-slip handles and middle spring help to control the chain pliers easily. There is a safety pin protection from opening and a clasp on the bottom to help for collecting two handles for storage. Bike chain splitter tool with Chain Hook --- The chain splitter tool is designed to remove and install pins to change the worn chain. Accompanying an iron hook could help to hold the chain sturdily, to prevent the chain from springing and hurting bikers. With a replacement thimble build-in handle, which could be used to replace in case of the original thimble is damaged by improper operation. The metal frame ensures strength and durability, rubber handle offers a comfortable and anti-slip grip. Bike Chain Checker --- When does the chain needs to be replaced? Use this chain checker tool to measure the state of your chain. It is possible to measure broken chains at any time. If the 0.75 or 1.0 tooth will pass all the way through bike chain, which means it is worn and must be replaced immediately. Bicycle Missing Link --- These magic chain buckles help for temporary use or repair bike chains when you have a broken chain on the trail or road. It could be reusable, and easy to assemble and disassemble. Make the chain cleaning and maintenance process much easier. The chain magic buckles are mainly for 6/7/8/9/10 speed chains. It is suitable for BMX bikes, folding bikes, mountain bikes, road bikes, etc.