Problem Solvers Cable Doubler 1:2. Allows one brake lever to operate two brakes. Applications include physically challenged riders, tandems, trikes and quad cycles. Works on all cable actuated brakes.Requires three standard cables (at least two road cables) and housing (type dependent on application)Cables and housing sold separatelyLow profile machined aluminum tube hard anodized with Teflon allows low friction movement of the internal sliderMachined end caps and internal piecesItem SpecificationsUnit of SaleEach