INNOVATIVE PRODUCTS OF AMERICA Grease Joint RejuvinatorMaster Kit IP7863 Grease Joint Rejuvenator Master Professional Model Pocket Model 5" Flex Hose Extra Grease Coupler Have you ever tried to push grease in through a grease joint or fitting and couldn't? The Grease Joint Rejuvenator opens clogged grease joints and fittings effortlessly in less than a minute! Opens clogged grease fittings & joints Cleans and replenishes old and dirty grease fittings Loosens dried grease in joints Cleans ways and stays in milling machines and lathes Lubricates bearings on farm, lawn & construction equipment How it works: Remove the piston end and fill the tool with penetrating oil. Then place the end over the grease fitting and tap on the piston head with a hammer until it starts to move down into the tool body. The hydraulic pressure created by tapping on the piston forces the penetrating oil into the grease joint where the blockage is and loosens the old hardened grease (or dirt), flushing the blockage and clearing the way for new grease.