Two mile all-round light. For boats up to 39.4 ft. (12m) in length. Features a die-cast Zamak base with locking knob that allows pole to be lowered below the deck or removed for storage. Includes one 12 watt lamp. Below deck clearance required: 24" deep X 1" wide. Installation hole size: 7/8" diameter. Base is pre-drilled with three countersunk holes for #10 screws.