CONSTRUCTION GRADE CONCRETE FORM TIES: Premium quality and heavy duty, our concrete form ties are made from 11 gauge black annealed steel, an ideal and reliable choice for construction contractors. COMPATIBLE WITH STACKING TIE WEDGES to secure and connect concrete molds, maintaining their integrity under pressure. FOR 6 INCH CONCRETE WALLS! VERSATILE: Compatible with most standard modular forming systems. PLYWOOD FORM SYSTEMS: Used in either 1⅛" waler-less plywood form systems or 3/4" HDO plywood. Stiffen and align concrete walls with Sandbaggy Flat Stacking Ties! Great for most standard modular forming systems, these 6" concrete wall ties are used with stacking tie wedge's to secure and connect concrete molds. Constructed from high-quality steel, these concrete wall ties offer long lasting durability, making them ideal for contractors and construction applications.