Ettore Pro Series backflip combo-tool is a revolutionary breakthrough in window cleaning. It combines the two primary tools used by professional window cleaners into one easy-to-use product. With the touch of a button you can use individually or in time-saving combinations. One tool four uses. The combo tool combines quick release which makes changing channels on a squeegee easier, also includes our durable microfiber washer that wipes the toughest dirt, grime and grease imaginable. One thing to keep in mind is that squeegee is 2 in longer than the washer.