Stayput Bungee / Shock Cord Loop Fastener in Black w/ White Knob Attachment Point Black Stayput Fastener w/ White Attachment Point & Installation Screw Installation is Simple in Varying Thicknesses of Fabric Without the Need for Special Tools A greater contact area with the fabric reduces the risk of tearing out and damaging the fabric Brass Machine Pressed Crimps on The Cord Will Not Rust or Pull Off The Stayput fastener is simple to install and easy to use. Simply make a hole in the fabric you wish to install the fastener to and place the two pieces together, set with a mallet and your done except for placing the knob attachment point. The attachment point is easily installed by using a screwdriver or hand drill and drilling the #10 1" Stainless Steel screw into the desired location.