For use with Charleston Cobra light fittingsThe 75mm polycarbonate spike is for use with Lumenas 12v and 240v Charleston Cobra light fittings. This Polycarbonate Ground Spike has a special cut-out in the thread to allow for the 12v plug and play connector to fit through. This strong, durable, polycarbonate ground spike has four fins and an anchored base. It is a larger version alongside our50mm polycarbonate spike. This 4 fin ground spike is 75mm thick, meaning it adds more stability and support than standard ground spikes. The anchored base allows it to lock into the ground efficiently and sturdily. This polycarbonate spike is for use with all Charleston Cobra light fittings as they all have the same 0.75 thread.