Use with all circular saws, routers, jigsaws and other portable power tools;Ridged Aluminum Straight Edge Guide for making straight and accurate cuts;Soft-grip non-marring rubberized clamping pad, securely grips all surfaces;Modular design allows additional aluminum extrusion sections to be added to expand the capacity up to 100-inch;Positive 2-3/16-in x 5/8-in clamping pads secure firmly to all surfaces for many clamping and cutting applications