Ancra 49207-137 double l track standard slider web winch this standard slider winch is designed for use on double l track. the frame is made from a lighter 7mm steel that is heat treated for strength with a black powder coated finish for exceptional durability and corrosion resistance. meets dot, wstda-t3 and canadian standard 905. accepts webbing up to 4″ in width and has a wll of 5,500 lbs..