Use the CountyLine Chainsaw Bar Tip Grease Gun to easily inject lubrication into the sprocket of your chainsaw. This helps extend the life of your guide bar and your chain. The grease gun is made from high-impact plastic to ensure rugged use and it features a steel nose pressure-release tip. The reloadable cartridge can be easily filled with all-purpose grease for many years of use. The grease gun can be used with all chainsaw guide bars that have a sprocket nose tip.