A wonderful gift for you and your friends, allowing you to enjoy fun DIY and play wonderful music.Feature:The machine itself will attach to any one of the three holes. Which hole represents a "gross" scale adjustment; each hole is about 9mm apart, providing ~27mm of bridge-to-nut adjustment.The machine mounts to one of the aforementioned holes with a 3mm Panhead Allen bolt (included).The machine is slotted where the bolt goes through, providing ~15mm of intonation adjustment--loosen the bolt, slide the machine to intonate. The saddles are threaded brass cylinders, with a pivoting center slotted post that the string sits in. The kit comes with equally beautiful string clamps that mount above a regular nut.Specification:Material: Solid BrassColor: BlackDear friends, if you are not satisfied with our products or services, please contact us immediately , and we will try our best to solve it.