Canada Fastening’s #8, 3 1/2″ square head construction screws are designed for reliable and efficient use in a variety of building and construction applications. Made with durable materials, these screws feature sharp points and aggressive threads for fast and easy installation. The square head design provides improved grip for easy tightening. These screws provide a secure and lasting hold, making them ideal for any construction project. Count on Canada Fastening for all your construction fastening needs.