The Ultimate Wire Stripper automatically adjusts to the right size wire, simple and easy to use. It comes with a built-in cutter as well as a lifetime warrantee. It works on solid or stranded wires 12 to 24 gauges. It is a must for any household or business. Great for automotive, electronic, boat or aircraft use. Available in two convenient sizes. Great for double stranded lamp cords and even 4 - 6 wire telephone wire.