C-A-R-D 3/3

C-A-R-D 3/3 are SD90 exclusive use.
SD510 is equiped standardly with C-A-R-D 3/3.
C - Carbon Fiber
Made from a specially formulated carbon fiber composite resin, CARD is both lightweight and extremely durable.
A - Align Center
CARD features a centering guide molded into the base that insures correct string post positioning in relation to the tuner bushing.
R - Resonant
The high-density CARD material transfers string vibration to the instrument headstock more efficiently, improving sustain and harmonics.
D - Defend
The CARD base is .05 mm thicker than the inside cavity of the tuner cover and acts as a spacer to prevent damage to the headstock finish due from sharp metal edges and over-tightening of mounting screws.

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