Domed Nuts to Replace Wingnuts on Twinset

what makes Halcyon different? Simple. To provide the most robust and highest quality diving gear for recreational and technical divers throughout the world, a production line from divers to divers, Halcyon created the DIR Diving System. Professional tools for everyday diving. Halcyon is used by recreational divers the world over for the sheer pleasure of diving with equipment which does not interfere with their enjoyment of the aquatic world. DIR dive systems have made Halcyon the industry's leading brand in simple, safe and affordable gear. Rapid and constant improvements as well as upgrades, added to the outstanding performance, have left the imitation market of inferior copies gasping. DIR divers use only the very best equipment and with Halcyon, you know you are dealing with that: The Very Best. Halcyon believes that every detail makes a difference in the quality of your work and play. And for Halcyon, diving is more than"just another way to spend a weekend".