Wedge Bolts are used with x flat tie to tighten adjoining concrete forms&fillers, securing the x flat tie and concrete form in place. The full set of the Symons Formwork Accessories includes Wedge Bolt, X-Flat Tie, One Piece Waler Clamp, Z Tie Holders & Waler Tie, J-Strongback Hooks and Strongback Ties, Scaffold Brackets and Turnbuckles.