POINT-7 SDM ALUMINUM DOUBLE XXL PULLEY MAST EXTENSIONOVERVIEW Having the right tools, is half the work done. The Point 7 extensions are based on a very simple indestructible system that is quick and simple to use and allows for effortless downhaul, even on very big sails. The pulley and cleat system is attached directly onto the aluminum tubing, with no crossing lines. With the brass rollers, downhaul efforts are reduced to the absolute minimum. Quick functionality points on the base system: Double