[Stitched Rulette]

[Groover & Roulette Set]

[Stitching Divider Replacement Blade]

[Stitching Dividers]

[Stitching Groover Replacement Blade]

[Stitching Groover |  Replacement Blade (twisted)]

[Stitching Groovers]

Set includes line-drawing modela, groove replacement blade, and hex wrench.
Revolutionary groove cutting with a minimum 0.04 inch (1 mm) width by the blade in the center
It can be used for both right and left handed directions, and remove the guide to use as a grover.

(From )