Screw Tight Design:No need to strip the power wire as the connector pierce the insulation and hold the wire in place, and make sure there is enough wire expose(1/4inch) for the light fixture, so that it get wrapped around the internal post of connector and held tight as you screw the small cap on. Wide Application:These low voltage wire connectors are for 14, 16, 18 and 20 gauge wire of low voltage landscape lights, great for 12, 14 gauge power cord. It works for both stranded and solid wires., widely used for low voltage landscape spotlight, path lights, well lights, deck lights,etc. :Made of ultra strong High-quality materials and plated brass pin, to the stability and safety of the connection. So this connector can last several years without issue, no need to change them frequently., Manufacturer: Akfldms