This design is of Inuit origin, but I know that other natives, including the Scandianavian Saami used similar designs. The idea is simple. You have a hollow case, a leather/buckskin strip and two stopping devices. When closed it looks like the photo below. The needles are then protected inside the tube.
To open it, simply pull the opposite stopping device.
The needles are stuck into a buckskin pad.
A proper belt hanger could be made for it, but for this one I used only a stick to make sure the thong doesn't go all the way through. I will just carry mine in a pouch.