It has a tool-free adjustment for depth-of drive, so you can set the nails perfectly every time. Make sure to consider this gun for your next project. Plus, its lightweight aluminum body makes it easy to use, even for long periods of time. APPLICATIONS: This roof nail gun is perfect for a range of applications, including upholstery, woodworking, flooring, roofing, molding, door and window installation, and more. It's easy to use, even for those with limited nailing experience.CUSTOMER SATISFICATION: PowerSmart strives to provide excellent value to consumers through quality products at the best price possible.