Product Description: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Hardtail Bridge's the top-loading saddle design is easy to install and access, and can be adjusted to the tone and height level.4.Tuning Peg Machine Head is made of sturdy plastic and steel plate, which is durable and convenient and the chrome plate has a diagonal pattern, which can give you an excellent touch. It is easy to install, just slide the string through the hole, tighten the locking thumb wheel, and then adjust the string.5.They are compatible with ukulele guitars and small 4-string guitars. They are all able to replace the old damaged tuning nail heads and Bridge tailpipes.6.Tuning Peg Machine Head and Bridge Package include: 4 x Tuning peg machine head(2R2L),8 x Mounting screws,1 x Bridge,1 x Wrench,4 x Screws.Specifications:Material:Hardtail Bridge: Zinc alloy, copper ballsTuning Peg Machine Head: Stainless Steel, plasticColor:Hardtail Bridge: SilverTuning Peg Machine Head: ChromeSize:Hardtail Bridge: 6x4x1.3cm/2.36x1.57x0.51inch(LxWxThi)String distance: 1.03cm/0.41inchTuning Peg Machine Head: 5.5x3x6.5cm/2.17x1.18x2.56inch(LxWxH)Weight: 160g Package include:4 x Tuning peg machine head(2R+2L)8 x Mounting screws1 x Bridge 1 x Wrench 4 x Screws