Use these aluminum push pins with the Layout Block System. A Delphi favorite, the system allows you to build your panel straight and square with aluminum blocks and these push pins. Purchase homosote board (item #5176) for a lightweight soldering surface. Use the blocks to fit any size up to 16" x 26". Extra 23", 17", 12" and 3" Add-Ons allow you to handle virtually any size panel.