This unit is a must-have when you need a little side-by-side customization. Or a cheap replacement. This set of 2 comes with a lifetime guarantee. I replaced one that broke after a few years of use. The photos look the same but in real life they are different and it fully suits my needs. Helpful Installation Tip: Mark existing grooves and holes before removing the backing. They use slots and holes to align where the screws go in the new ones. If yours is electric stapler like mine, use a screwdriver to gently pry up the side or top edge, then hook in a needle vise to hold it. Use a flat mini pry bar (Super Rod) to pry it out. You can then use a vise to remove any remaining staples.