Materials: 1 variable speed jigsaw , 1- 18"x 18" x 3/4 ply , screws . Drill 1/4 hole 2" from edge of ply in center of board. Insert saw and cut toward edge 1/4 to 3/8". stop saw but do not remove. Screw and clamp saw to ply securely. Flip assembly over and screw solidly to workbench. Works good with foam ,wood , flat aluminum stock. Wanna get fancy? Install a combo switch/receptacle where you plug in and you have a handy on/off switch.