Pattern Master impulse sprinkler programming disc easily adjusts up or down at 16-points within a single rotation to create unique shaped water patterns. Rotation control, adjust trip lever and collars for full or partial coverage. Special speed control for even coverage. Durable fold-out sled base provides greater stability, folds for easy storage. Impact-resistant, rustproof polymer construction. Water coverage up to 5800 sq. ft. (86' diameter).