Tilta’s 12″ Threaded 15mm Rod is a 12″ rod 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. The chamfering makes it easier to slide accessories onto the rod, while the end with the straight cut makes for a smoother rod join.