The Laser Harken Power Pack is a complete kit and will upgrade your old Laser cunningham and outhaul. The Harken Power Pack is retrofittable to older hulls and uses existing screw holes. The Power Pack is supplied with FSE ropes, blocks, cleats, screws, and fitting instructions. The Harken Power Pack is the top of the range kit and is also supplied with the Laser XD Boat. All of the 16mm blocks (except the mast base blocks) have been replaced with T18 bocks to reduce weight and friction whilst refreshing the look. The downhaul top block has been upgraded to a 29mm T2 block to eliminate the line drag on the block as much as possible.