These Stand21 FHR Posts are designed to fit to Motorsport helmets which have a M6 female threaded receptacle built into the helmet. When these posts are fitted, it allows you to connect a FHR / Hans or Hybrid device to your helmet.The posts have a lug which limits the rotation of the tether, ensuring the correct orientation of the tethers at all timesStylish black finish with a Stand21 logo in white to match any helmet and FHR device combinationScrews directly into the M6 female receptacle with no special tools neededSupplied as a pairThese FHR posts are only approved for use with helmets which have the following homologation: FIA 8860-2018, FIA 8858-2010, FIA 8859-2015, FIA 8860-2010, Snell SA2010, Snell SA2015, Snell SA2020FIA 8858-2010 approved