RIF-Series, Repairable Air/Oil Inline Filter RIF-Series in-line filters are designed to protect small air tools, such as grinders, impact wrenches, nut runners and screwdrivers. It will extend tool life and reduces downtime by preventing foreign particles from entering the air tool, therefore eliminating expensive tool repair. Its compact and light weight anodized aluminum body can be easily installed directly before the air tool. RIF-Series inline filters can also be used in low-pressure hydraulic applications. They can remove debris or contaminants, hence decrease tool wear and improve system efficiency.