This official Fender 5 String HiMass Bass Bridge with Brass Saddles is used on their American Ultra/Deluxe V basses and adds sustain, resonance and improved attack. The saddles run in channels to remove any unwanted side to side movement and are individually intonatable and height adjustable. The top loading strings mount through the back of the bridge for quick and easy restringing and the bridge fits their 4 screw hole mounting pattern, mounting screws are not included.