Big Horn’s 4-way panel clamp is ideal for gluing table tops, furniture panels and doors. The 4-way action applies even pressure to glue joints while holding your panel absolutely flat. When 2 or more of these are used, buckling can be totally eliminated. Will accept material from 1/2-inch to 3-1/2-inches thick of unlimited length. (The length is determined by the rails you supply). Sold individually. See Big Horn 19623 to purchase extra 4-way clamp blocks which allows you to have rails of varying length readily available to use with your clamp.