Feature: Key shaft is a fixed key to the key in series up the axis; The reed is a spring that bounces the keys; Top screw for fixing key shafts; Reed screw for fixed reed; Hand care fixing screws for fixing the hand care; The adjustment screw is the screw that adjusts the tightness of the key. Material: Metal Package include: 14x Key Shaft 6 x Reed 10x Scerw.