Rubber protective case: Equipped with rubber protective case to ensuring and easy to carry or store. Ideal accessory: It adopts professional design to improve the efficiency of instrument maintenance and is very suitable for piano maintenance technicians. Each purchase comes a tuning maintenance tool kits,providing you with all the tools you need for piano tuning or repair tasks. Application: This piano three-pin tuner adopts a fixed screw design to ensuring stability and can be used to adjust three different positions,which is very convenient. handle: Consist of good-quality metal,providing a safe and comfortable grip.