We love HiyaHiya Flyers!
They function like flexible double points- you hold the stitches on two needles and use the third to knit, so you only have to change needles twice per row. They are flexible like a circular needle so you can move aside the tips you aren't using and fly along with the active tips.
Interchangeable Flyers are available with Stainless Steel tips or Sharp Tips. Each package contains 6 tips. Please Note: Tip set does not include cables. You will need to purchase the cables to make the interchangeable set work.