The rockwell rk5139k sonicrafter with hyperlock is three systems in one. Hyperlock makes tool-less blade changes simple and easy with less confusion. The hyperlock universal fit system allows for (1) quick and easy tool-less blade changes, (2) securely tightens blades with up to one ton of clamping force, (3) and accepts other brand blades with its universal fit system. No more searching around or shopping for the proper brand blade. The rk5139k 2.5-amp sonicrafter also has variable speed control which allows for precision cuts when tackling detailed jobs or even heavy duty tasks. Its effortless hyperlock design, and flexibility as a multi-tool, will make it your go-to-tool on the jobsite or around the house. Whether you're a professional or an avid do-it-yourselfer, the all-in-one and versatile rockwell rk5139k sonicrafter with hyperlock gives you the ability to sand, polish, scrape, and cut a wide variety of materials with easy blade changes. It is an effective tool to help streamline any job tasks. The variable-speed operates with microsonic high-frequency oscillation to produce smooth, safe movements without kickback. Ideal on the job site or around the house, this efficient tool boasts a slim body that makes it ideal for working in confined spaces. It will be your go-to-tool for all your projects like scraping to remove paint, old caulking, rust, stain, polish, or grout. Use it to score ceramic tile, remove and cut carpeting, or sand and polish those hard-to-reach spaces. Easily switch blades with the tool-less hyperlock to cut wood, thin metals, fiberglass, masonry, plastic, flooring, cement board, and even vinyl siding. It would take various other tools to do what the all-in-one rockwell sonicrafter can do in less time, less effort, and less hassle.