A saxophone having a body, a neck including a plurality of keys mounted thereon, each of said keys including an actuating surface and a bell including a valve protector, the improvement comprising a system for controlling the tension and travel of a saxophone player's fingers of both hands with a right hand device and a left hand device. The right hand device has an anchorage assembly mounted to the valve protector and a travel stopper elongated portion integrally extending from the anchorage assembly and kept at a substantially parallel and spaced apart relationship with respect to an actuating surface's plurality of keys thereby limiting the extension movement of a user's fingers as he or she actuates the keys. The left hand device includes an elongate stopper member with anchorage assemblies at its ends. The left hand device is rotatably mounted to facilitate its storage in storage cases.