The Coilhose 1/4" In-Line Lubricator (40014-DL) is designed to install directly onto the inlet of your pulse operated tools such as a nailer or stapler and provide oil. This eliminates the old practice of adding drops of oil into the tool periodically. With each operation of the tool, a proportionate amount of oil is delivered, ensuring long life of your tool. Constructed of anodized aluminum, these units are lightweight and corrosion resistant. The filling of fluid on the In-Line Lubricators is simple via brass fill cap. Please Note: For use with intermittent, pulse operated tools.