The MK K2977ALM is a surface mounted, aluminium, 13A, 1 Gang, Double Pole Socket. It is fitted with two earth terminals to provide a double earth facility for use when installations require a high integrity protective connection as specified within BS 7671: 2008. It also has double pole switching (neutral makes first, breaks last). The MK Metalclad Plus Range is made from heavy gauge steel making it a very tough set of products. This means they are ideal use in factories, workshops, garages and sheds. Earth terminals are fitted in the back box. · · · Current rating 13A · · No. of poles 2 · · No. of poles 2 · · Switched/ Unswitched: Switched · · Mounting type Surface · · Voltage 230V · · Fixing Centres 60.3mm · · Frequency 50/60 Hz · · Terminal Capacity: 2×6.0mm stranded (max)