I also use it to knit hats in the round, that way, I stay with one needle for the whole project. It is a SUPER EASY technique. The website also shows you how to knit in the round using TWO circular needles.
RE. Turkish cast on:
Quote from the website: "The Turkish Cast-On is an invisible cast on that forms a closed end. It is perfect for things like sock toes, mittens, glove fingers, pouches and purses.." For pictures, instructions and further info visit: