Four dimensions, one convenient tool, get perfectly spaced boards with Spax Deck Spacers. They're designed with ease of use in mind, ensuring uniform spaces between deck boards in four common sizes, so you're guaranteed a professional-looking finish without the hassle of nail or speed squares. And by using Spax Deck Spacers, you give deck boards the spacing they require to allow debris and water displacement, and to ensure the space to expand and contract.