Compact Residential Rotor. Big on Value and Convenience - The 3500 Series Rotor is an easy to use short- to mid-range ½" gear-drive rotor, offering value and convenience for residential applications - Utilizing a simple flat-bladed screwdriver, the 3500's arc adjustment is quick and easy - This versatile rotor offers an attachable nozzle tree with six superior performing Rain Curtain nozzles, and the convenience of reversing full- and part-circle operation (up to 360 degrees) in one unit - Plus, a nozzle-removal feature and an easily removable filter screen make maintenance a breeze - All of this, an affordable price, and a three-year factory warranty make the 3500 Series one rotor that is easy to use, easy to buy, and tough to beat.