DETAILS fabWing kits are the perfect compliment to any CertiFlat fabBlock system and ideal to use as a stand-alone table for cramped and odd-shaped working spaces. FW4212-U CertiFlat fabWing Features List: Heavy-Duty construction from 1/4″ thick A36 Laser Leveled Hot Rolled Pickled & Oiled prime steel. Heat-Zone™ Tab and Slot design methodology for an easy to build, flat work surface. Poka-Yoke design cannot be assembled wrong. High precision 16mm holes on 2″ centers to work with industry standard tooling. Infinite number of configurations to let you quickly assemble the size welding table you want.