1Multifunctional: This single roller saddle guitar bridge is multifunctional which can help you to improve tone and prevent string breakage. 2Easy Installation: This single roller saddle bridge comes with screws and a hex wrench, you can easily install it to your guitar using the screws. 3Compact And Portable: This metal single roller string bridge is small in size and light in weight, which makes it very easy to install and replace. 4Excellent Metal Material: This metal roller bridge is made of excellent metal material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 5Wide Application: This guitar roller saddle bridge has a wide range of applications and can be used for daily practice, stage performance and music recording. 3 xSingleRollerSaddleBridges 1 x Hex Wrench 6 x Screws