PROPER INNER AND OUTER ROUND HOLES - Outer part of corner piece
uses big round hole, which can increase corner-cutting and avoids
bumpy feeling. Inner small round hole makes inner structure more
stable and decreases deformation.
PRIMARY CORE - All feet of MF3RS are produced separately, using
primary core to reach a smoother hand feel.
OUTSTANDING ANTI-CORNER-TWIST FEATURE - Right angle design on
outer corners combines with inner big feet, bringing a good
UNIQUE CYLINDER CENTER CAP DESIGN - Unique cylinder center cap
design makes the components of the center piece combined closely,
also keep a good hand feel