The Kap-it Riser allows you to raise a sprinkler quickly and easily and with NO DIGGING. When a Spray head is too low, simply expose the top of the head, extend the riser and remove the nozzle. Add the Stem extension and slide the cap over the stem. Replace the nozzle and push the cap onto the top to snap it into place. For more height the Kap-it is stackable, just ensure the surface below each cap is free of any debris when installing