Product Description Master link opening made easy: the MLP-1.2 Master Link Pliers by ParkTool Many derailleur chains have a master link, which allows the chain to be opened and closed without tools. Dirt, corrosion and wear can make this difficult over time. With the MLP-1.2, master links can be opened and closed easily and quickly. Compatibility:all 5- to 12-speed chains with master linksManufacturer Number:MLP-1.2 Contents:1 x Manufacturer: Park Tool Company 1185 Eagle Lake Rd Shoreview MN 55126 USA info@parktool.com Distributor: GROFA Action Sports GmbH Otto-Hahn-Straße 17 65520 Bad Camberg Germany info@grofa.com