"David" wrote in message
...
I'm now trying to source some nice round cable tidy fittings to go into
the bespoke desk top.

First issue is that there are so many very similar products.
https://www.amazon.co.uk/Plastic-Computer-Grommet-Cable-Cover/dp/B0050GEOU6
How to tell which are good quality and which are not?

By looking at the customer reviews with a pinch of salt.

Price doesn't seem to be an absolute guide.

It never is.

Second issue, hole size.
The majority seem to be listed as 60mm (80mm also available).
However in the detail some say that they are 56 or 58.8mm diameter and
others say that they are 60mm diameter for the insert part that passes
through the desk. Many don't even give dimensions.

Yeah, often a problem with amazon and aliexpress.

Some are more detailed than others.
https://www.amazon.co.uk/Langdy-Grommet-Tidies-Surface-Brushed/dp/B0752NJY2S/
is notable because it supplies a detailed table for dimensions.

Hole size is important to get a snug fit.
I assume that you look for a cutter very slightly smaller than the
diameter of the fitting (and assume that the hole will be a little bigger
than the nominal diameter of the cutter) or you look for a fitting which
has plastic lugs/fins which ensure a snug fit in slightly larger holes.

Either way, the standard range of cutters doesn't seem to match the
60mm/80mm fittings.
https://www.screwfix.com/c/tools/holesaws/cat5920018#category=cat5920018

57mm or 64mm

76mm or 79mm or 86mm.

Anyway, has anyone used this kind of fitting, and if so are there any
recommendations of supplier/brand?