Sanwa Denshi GT-Y Octagonal gate

The GT-Y "octo gate" snaps onto a JLF joystick, replacing the default square restrictor gate. 

This octagonal gate allows an easier range of motion for the user to hit the corners of the gate which is especially useful in fighting games for special move activation. Also advantageous in shmups for equalised movement in all directions. 

Generally considered by many fans as a must have for the JLF joystick.