Our Shelving Jig is an easy-to-use, see-through template for drilling consistently spaced and centered shelf-pin holes. This Shelving Jig works with four different bit sizes to quickly and easily drill shelf-pin holes in a wide variety of projects.Big Horn Shelving Jig helps eliminate the hassle of trying to drill correctly spaced pin holes on your own. For use with assembled or unassembled cabinetry that features faceless or face-frame construction, the Shelving Jig is the ideal tool for building bookcases, entertainment centers, or cabinetry with adjustable shelves, or for adding shelves to existing units. The clear template features laser-cut accuracy for consistently spaced, and centered, shelf-pin holes.