Deck Jig™ Spacer Rings ensure a consistent 1/4" (6mm) spacing between your deck boards while you drive your screws to secure the board. This provides proper clearance between boards for drilling with the Deck Jig and driving Deck Screws, plus ensures adequate airflow and drainage to make your deck last longer. These durable rings are easy to move and are designed to rest securely between deck boards during installation. Designed to work with the Kreg Deck Jig™. Sold as a pack of twelve.