Rotor Tools Operation Instructions: To adjust the angle of the sprinkler, simply clamp the 'ring' part of the tool onto the sprinkler head and rotate the head to set the angle between 90 degrees and 180 degrees; For adjusting the spraying radius, insert one side of the bottom tip of the rotor tool into the groove of the nozzle, then rotate it to either reduce or expand the spraying range.
eBay