This third arm is used to hold lei in place for you. This can be used for all types of projects to make it easier such as: lei hulu, haku lei making, braiding, etc. This "third arm" comes assembled ready to use, includes: Industrial Clamp (brands may vary upon availability) - to hook to table Rings, Snap Swivel and bird clamp - affixed and ready to hold your lei in place so that you can work independently. This is optional, but a definite "must have" for the more serious lei maker; total game changer!