Rain Bird 4-Inch 19 to 32-Foot Coverage Radius Simple Adjust Universal Shrub Rotor Sprinkler Head 32SA-SHB (Discontinued by Manufacturer) Perfect for watering hillsides, ground cover and large areas of shrubbery Mounts on a 1/2-inch or 3/4-inch riser to clear tall shrubs and planting areas Simple spray distance and pattern adjustments requires no special tools Water lubricated gear drive design for durable reliable operation Bottom screw allows user to "lock" the rotor to the riser and prevent theft