Wire hooks are an excellent way to keep ICF blocks secured to one another! Horizontal hooks help hold the shape of your ICF project. It does not allow as much movement at block joints, which in turn keeps the dimensions more accurate after the concrete has been poured. They are designed to secure blocks that have adjacent factory edges, which makes them very handy when connecting corner blocks, and any uncut blocks together like on the bottom and top rows.Wire hooks are sold by the box. Each box contains 250 hooks.