Hunter FX Luminaire 753900 8" Black Super Slot Spike. The Super Slot Spike secures fixtures firmly into the ground. Constructed from UV-resistant ABS, it incorporates a composite thread featuring a slot cut out of the threads to simplify the wiring process. The side wire insertion slot makes installation easier. Included with most FX Luminaire up light fixtures. This 8" spike is the standard for most FX path lights.