The DEWALT DWATFA1 Oscillating Tool Free adaptor with 2 Blades Quick Change allows for fast changing of blades as well as fast changing of the position of the blade, all without the use of a hex key. Easy installation takes less than 30 seconds to Install. This adapter fits all major brands: Fein, Bosch, Dremel, Rockwell, Craftsman, Milwaukee, Ridgid, Skil and Ryobi. Includes 2 blades with the adaptor.