Furse copperbond earth rods probably offer to the installer, the best and most economical earth rods available.
They are made by molecularly bonding 99.9% pure electrolytic copper onto a low carbon steel core.
Furse rods are not of the sheathed type.
They are highly resistant to corrosion, and because the steel used has a very high tensile strength, they can be driven by power hammers to great depths.
The counter-bored couplings are made from high copper content alloy – commercial brass is not used.

Available as Threaded – UnThreaded
Standards
IEC/BS EN 62561-2 (14.2 mm and 17.2 mm dia. rods without UL suffix)
BS 7430
UL467 (RB226-UL, RB236-UL, RB326-UL, RB336-UL)