Now you have no more worries as to how have to pack for the handling guitar, piano small knock a small touch button and let the strings out of tune! The guitar will not off key if you lock the screw post when tune the guitar properly. sealed machine heads Auto Locking Tuners (Tuning Pegs) Heavy duty internal gear Colour: Black and Chrome Package Included: 6x Guitar Tuning Pegs 6x Ferrule 6x Threaded bushing 6 x screwNotice for purchasing the acceories of the electric guitars As there are so many different kinds of electronic guitar acceories with exquisite sizes and the suppliers for these goods are different, please ask the exact size to the sellers directly. Please measure your size exactly and then let us know. We sell only according to the size listed by yourself in the order. About the sizes As there are many different kinds of guitar spare parts and acceories. Size pictures for the products which need exact size to fit the guitars have been listed. Please confirm your size carefully before order. Some allowable errors in a fixed range would be there because of the different patches and measuring errors. About the color difference All products should be take photos on spot! Due to the shooting light and the different screens, etc, the photos colors would be a little different from the real products. All colors should follow the real products only.