Abstract: A system for adding weight to and/or balancing the bottom rail of a window covering includes one or more body members positioned within the bottom rail, and each body member having a plurality of sockets for receiving weights. In the most preferred form of the invention, the sockets are horse-shoe shaped are adapted to receive elongate rods having a circular cross-section. The plurality of sockets in the most preferred embodiment include sockets located adjacent the front of the bottom rail when the body member is in place and other sockets arranged toward the rear. Weighting and balancing is achieved by placing one or more rods in selected ones of the sockets.