Custom length drilled rails are available by ordering MMP-1021-D make the quantity match the total number of feet needed. A custom drilling charge of $84.50 is charged for setting up the machines to drill special lengths your order must include MMP-1021-DC and a shipping container may also be needed if you are purchasing rails longer than 6'. The $84.50 drill charge covers multiple rails and is not per rail this charge cover labor for setting up the CNC machines to drill the rail as well as the CAD drawing required for the job. Rail is sold by the foot order the total number of feet needed you must buy the whole foot. Rails are drilled for 1/4" flat head machine screws.