ArmorGard InstaGate Linking KitThis heavy duty Armorgard Instagate Linking Kit is built from sturdy 8mm steel that has been zinc plated to protect from corrosion. Each linking kit comes complete with four M8 coach bolts that are used to secure the link to barriers, and an Armorgard branded spanner, ensuring you have the tools needed to deploy the linking plate. If need to be able to unlock the barrier to facilitate access, you can replace one of the M8 bolts with a padlock,