The Pro Series 67537 Variable Speed Oscillating Multifunction Power Tool by Chicago Electric is a corded electric tool designed for a variety of tasks. With a keyed chuck size of 1/4 inch, this oscillating tool offers adjustable speed control for precision and versatility. The tool, in a sleek blue color, is a single unit that does not include batteries or additional pieces. Powered by 120V, this model (CHICAGO 68861) is a reliable and efficient tool for DIY projects and professional use. Made in China, this oscillating power tool is a must-have for any workshop.