Used for sharing parallel or serial peripherals You'll find the our line of DB25 manual switch boxes are perfect for sharing parallel or serial peripherals. These switch boxes feature a heavy-duty, easy-to-turn rotary switch enclosed in a metal case with rubber feet to protect your desk or table top. The rugged metal case is designed to withstand the rigors of everyday use and helps prevent unwanted EMI/RFI interference. Each connector is wired straight-thru in a pin-to-pin configuration to ensure compatibility.