Tama WBSS65SPF Starclassic Walnut/Birch Snare Drum (Satin Sapphire Fade) - 6.5" x 14"Bearing Edge The shape of the edge is one of the most important factors which affect drum sound. Because the drumheads provide the important source of vibration, the shape of the contact point of the head and shell determines and defines the sound. This is why TAMA has worked so extensively on achieving the most functional shape for the drum head and edge. Picture shows a sectional view of the drum's bearing edge. As shown in Part A, the angle of the