MAHDPRO Desk Grommet 2 Inch (50 mm) Pack of 5-Black ABS Plastic Cable Hole Cover to Arrange Wires & Cords Through Computer Table/Countertops

These are decent for what you pay. 50mm equals about 1 7/8 inches. I drilled a 2 inch hole and they do a fantastic job on horizontal surfaces. However, on verticals, there was too much wiggle room and I needed to add some foam adhesive tape to make up the 1/8" difference and get a snug fit.If you have a 50mm hole saw / drill bit - you'll be pleased with a snug fit. In short, it is a workable solution for a 2" hole, but not completely ideal. 3.5 stars

Installed two on my built in desk, fed by power from two power strips mounted on the underside of the desk. Not more power strips, transformers, and other clutter on my desk, all hidden now.The holes I bored using the dimensions suggested were a hair too big, but I used adhesive on the underside of the Grommet to attach it in place. Worked great.only 3 stars on easy to install and accuracy.If you don't have a drill and hole borer, it will cost you $$ to buy those to make the holesonly 3 stars on accuracy, as mentioned the holes I bored out were a hair too large and required adhesive. The ridges on the underside of the grommet could not "catch" firmly.

Used a 2" hole saw and these fit really lose in the hole. Any movement of the cable can pop them out. The ones I mounted horizontally work marginally because gravity holds them down, but the ones I mounted vertically fall out all the time.

The hole in my desk is in the back of it and these are very small and it falls out of the hole very easily. I shoved tape in it and it stays but it's kind of ghetto. Not a fan

Grommets may fit snug in a 50mm sized hole but not a 2 inch hole. I had to glue it into place. Other than that they are perfect for the price.