Stacking Clip - The stacking clip is great for the extra few inches you need when pouring to heights greater than your forms.  Just attach to your form like the line up rail and lay a 1 1/8” form on its side or use dimensional lumber.  The stacking clip comes in two sizes:  1 1/8” to 1 1/8” or 1 1/8” to 1 5/8”.