Black Aluminum Screw on Spike for Helmets Rat Rods Helmet Spikes Half Shell Harley Davidson 2 3/4 Inch Metal Spike

Brand new full weather proof made in the USA - Made from solid aluminum, has a quality finish unlike the cheaper spikes available elsewhere. Base of the spike is 3/4" dia. Beautiful polished Black spike is 2 3/4" long. COMES WITH THE screw has 1/4"-20 threads which are very common. These will fit the threads that hold the air cleaner on older cars that aren't metric. (great for rat rods) Meets or exceeds DOT requirements FMVSS 218