Suitable for all installations around the house including hot & cold water, Can be used with central heating, Finished in grey these durable clips are so easy to use, Kitemarked BS 7291 parts 1 & 2 Class S, WRAS Approved, There is a hole in the centre of the clips for easy secure installation using a screw, Pipes are held securely against flat surfaces for a neat professional finish, You will also require screws & possibly raw plugs (depending on the surface you are fixing to) & a screwdriver to install these clips