Fire nails

Fire nail is a kind of light pole nail with spherical spacers inconvenient to use nail. It is a kind of bare rod nail with reckless spherical spacers. It mainly includes a nail rod and a nail head, in the middle of the nail head is set a force block, the force block is flat cylindrical, the diameter of the force block and the diameter of the nail rod, the force block and the nail head are connected by a smooth surface, in the nail rod is set a spherical spacer, in the nail rod between the spherical spacer and the nail head is set a plastic white ring.