Our Surgical Steel Spike (or Cone) Barbells are all 316LVM, and at a very high polish. This is not the cheaper overseas grade of 316L Surgical Steel body jewelry that you are usually offered by many other company's. Our Barbells are threaded for a precision fit. Spike Barbells are the perfect choice for eyebrow, nipple, and many other piercings. As always, bar measurements are taken from between both balls. Barbells come with solid 316LVM Surgical Steel Spikes.