GREASE CLEAN & EASY Unlock compatibility with your battery operated grease gun and our KAJO screw top grease cartridges. The PATENTED adapter design replaces the conventional spring plunger/ barrel section by. Simply take out the spring plunger, install the adapter followed by a cartridge, prime fully the 1st time and you will save time and reduce mess forever! All major brands covered See our grease packages * NOT designed for HUGO tube thread* Grease-gun skin or battery not included