On Thu, 27 Nov 2014 10:47:49 -0700, Tony Hwang
wrote:

Now I use local window manufacturer by
custom order since. Good price, good service.

....this is a kewl tool, a local business used when I ordered two glass
panes be changed to tempered glass...

Merlin Lazer Glass Measuring Guage:

_Merlin Glass Measuring Guage: Ideal for accurately measuring glass
and air-gap thickness in single, double and triple glazed units._

- Fast – measure unit thickness for replacement purposes.

- Accurate – identify laminated glass in any situation, ideal for risk
assessments.

- Quick – just point & click, glass & air-gap thickness are displayed
on the calibrated scale.

- No glass removal necessary.

http://www.dortechdirect.co.uk/window-installer-tools/merlin-lazer-glass-measuring-guage.html

https://tinyurl.com/kswkwjf

picky picky