Quickly and Effortlessly➤ Insert single and double boxes quickly and easily. Four blades cut at the same time, fast and simple, and the cutting surface is very smooth and clean. The fine and clean cut makes the socket installation easier..Precise Cutting➤ Accurately create a single-group size of 2-3/8” x 3-3/4” or a double-group size of 3-3/4” x 4” on the dry wall, perfect for plastic, metal or low-voltage electrical boxes mounting..Strong and Durable➤ High quality stainless steel construction laser cutting technology for durability and long life, Suitable for plasterboard, dry wall etc..Widely Used➤ Make single gang or double gang rectangular holes in drywall for wall boxes such as high and low voltage tech, electrician, telephone, alarm/ security, CCTV/ IP camera, antenna, automation, home-theater, etc. Do not use for metal materials..Applicable Persons➤ Perfect choice of professionals and hobbyists, Provides much convenience to your daily woodworking, Using for hand making a drawer or other woodworking. Used for drilling, installation of the drawer door spherical tip, tip, slat wall boards, plastic products, wood, plywood, etc. more trepanning.