These are 3D printed red and green planer board lights complete with securing screws and waterproof twist-on, twist-off LED lights with batteries. Lights can be inserted with LED pointing up for maximum brightness, or to highlight flag, or LED down inside of cup for maximum glow. Mounts anywhere on your board. Fits all planer boards. Up to 100+ hours per replaceable  (2) CR2032 coin cell batteries. Pilot hole is recommended for quick and easy install!