5.5mm x 2.5mm DC Power Plug to Screw Terminal AdapterAdapts wire leads to coaxial/barrel DC power connector.Screw Terminals to 5.5mm O.D. x 2.5mm I.D. DC Power Plug.Features:DC 5.5mm x 2.5mm plug with marked polarity for the solderless set screw terminals.Center is Positive.Ideal for CCTV security cameras. No more soldering.A small screw driver is all you need to connect you power leads.19453 PL