Nemtek Earth Spike 1.2MM Clamping System 

Hot dip galvanised or copper clad earth spikes with
nuts and washers
Available in both 1.0m and 1.2m lengths
Earthing kit available to be used in areas where the
earthing conditions are not good. These kits include a
conductive earth compound
The double nut and washer makes a good electrical
connection with the HT cables