The triple restrictor plate for Seimitsu LS-32 and LS-32-01 joystick fits atop the light blue square restrictor plate, and acts as a subguide.
Three restrictor guides
The plate features three restrictor guides for various play styles:
For fighting games, the circular guide gives you the same degree of control as the Sanwa GT Y Octagonal Restrictor Gate, or JLF GT-Y Octagonal Restrictor Plate Insert. This makes it possible to perform quarter-circle, half-circle, and full 360 movements much easier than the stock square gate.
For retro arcade games that only require up, down, left or right movement (no diagonals), the second cross-shaped guide will provide this level of control.
For even older games where only two directions are required, the third bar-shaped guide serves this purpose.