The Tilta RED V-RAPTOR 15mm Rod Pair – 8in includes two 8 inch 15mm rods with female threading on both ends. This allows you to use optional threaded rod adapters to extend the length. As a standard practice, Tilta chamfers one end of their rods and leaves the other end with a straight cut, making it easier to slide accessories onto the rod, while the end with the straight cut makes for a smoother rod join.