Sphere roller 6 8 10 12 mm

Tool for building spheres of various sizes (6, 8, 10, and 12 mm).
The recesses on the side measure the volume of polymer clay needed for each sphere.

My collection of rollers:

• Sphere roller 6 8 10 12 mm - this thing
• Sphere roller 5 7 9 11 mm - https://www.thingiverse.com/thing:7284435
• Sphere roller (imperial units) - https://www.thingiverse.com/thing:7272582
• Conical beads roller - https://www.thingiverse.com/thing:7293209
• Eggs roller - https://www.thingiverse.com/thing:7305589