Refill your hand-held grease guns easily and without getting greasy yourself by installing this Lincoln filler nipple into the top of your grease gun. The nipple threads into the plug on the top, and then can be connected to a grease gun filler pump. For over 90 years the industry has recognized Lincoln as the leader in professional lubrication tools. Professional automotive, agricultural and industrial mechanics depend on Lincoln tools for their livelihood. Lincoln tools offer a lifetime of performance and are backed by the most comprehensive warranty in the industry.