"Why is this useful?Make edges, columns and corners more visible.Minimizes collision damage to vehicle and garage.Helps prevent damage to your car doors and bumpers.Helps protect your garage door sides, columns and edges from nicks and scratches.Very easy to install.The Edge Warning Protector will take the risk out of parking in a cramped space. The Park Right® Edge Warning Protector is designed for garage entrances, support posts, or anything you want to be more visible when parking. Comes as a set of 2. Each is 14.75 inches long and 6.75 inches wide. Designed to fit over a corner or be one large protector, installation is simple. Each comes with adhesive already on the back, so just pull off the strip, make sure the surface is clean, and adhere the unit to the corner. It's that easy! The red and white stripes on the Edge Warning Protector make it very easy to see and can make even the darkest of corners of your garage visible. The Edge Warning Protectors can save you the cost of repairs for both your vehicle and what you might strike. Also great for concrete light post foundations in parking lots and support columns in underground parking garages.