The Starborn Pro Plugs for Azek Trim - 400 Pack is a superior and easy-to-install plug fastening system for Azek Trim. When used in combination with epoxy coated or stainless steel fasteners and the Pro-Plug Tool for PVC and Composite, it gives builders the an easy installation with the ability to choose the right screw for a wide variety of applications. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.