RW-THSK is a new Thread Magazine System for the PacBay rod wrapper thread tension carriage. It enables you to stack two additional spools on top of the existing thread tensioner to add more thread spools to the wrapper. It also allows you to organize your thread spools and quickly change out to two new colors. RW-THSK comes with a detachable screw-down base plate and two mounting screws. This tensioner can also be used to build your own custom rod wrapper.