PROLUBE 44907 Jaw Type coupler to button head coupler Quick Connect Adaptor. Connect or Disconnect with a snap. A simple and effective system that renders versatility to grease guns. Greasing in inaccessible, difficult to REACH areas becomes very convenient with the use of any of the quick link accessories. No threads, no screwing or unscrewing, just snap on and use on sealed bearings, u-joints, high-pressure insert fittings and recessed fittings ready to use range is detailed in the following pages. The system is suitable for use with hand operated grease guns only.