This is a kit of two (2) high quality female sockets. Each socket is marine grade and is weather and UV resistant. The contacts are nickel plated and the socket body is heavy nylon plastic. The socket is vibration resistant, unlike less expensive versions. It requires an 1 1/8" hole for mounting and has .250 quick spade type male connectors. It can be mounted against a panel with the retaining nut on panels up to 1-1/4" thick. For a thicker panel use the included compression plate which keeps the socket in place from the front on a panel of any thickness. The socket is rated at 150 watts or 12 amps at 12 volts but can operate with peak loads of 15 amps. Socket draws no power when not in use so it can't run your battery down. Works with any standard cigarette lighter plug or lockable marine plug. A locking plug looks like a regular male lighter plug but when twisted in this socket can not be pulled out easily, unless twisted again. It is weather resistant and vibration proof. Not for hot lighter use. Quantity sockets available at one low shipping price of $4.99 B007JCSQ6W 3 sockets, B0091A1U2W 4sockets, B007HD8FT6 5 sockets, B007HD1PFC 10 sockets, B007ZK1B2E 20 sockets, B007HDPAVM 50 sockets, B007HDLMW8 100 sockets, Paste 12vtechnology into the Amazon search box to see all of our items.