If you find this model useful, please give it a like!

Originally an adapter to make the hole in my patio table smaller to better hold the umbrella I bought, I realized it would be pretty easy to make it parametric and make the same model useful for other applications. 

Just change the following variables:

• innerDiameter: diameter of the hole through the grommet
• outerDiameter: diameter of the outer part of the grommet that will fit into the hole you are putting it in
• lipHeight: how high the grommet projects above the surface of the table or desk
• lipWidth: how far the lip projects outside the diameter of the hole in the table. I'd recommend a minimum of 2-3mm
• holeDepth: the thickness of the hole you are inserting the grommet in. 

Please share any comments you have, I'm open to feedback!