What Tool Opens and Closes To An Exact Angle

[charliegolf]

An adjustable try square is the best description I can give. I want to cut 20-odd T&G boards to go along a sloping flat roof; with the same angle.

What tool is that?

Ta.

 

[Burnerman]

A sliding bevel gauge.
John

 

[foxhole]

Quicker with a chop saw.

 

[matlob]

I've used one on these for a similar job. You can sit the adjuster along the length of the board.

Or measure and cut one and then use the cut piece as a guide for all the others

https://www.amazon.co.uk/Oarton-Carpenters-Adjustable-Aluminium-Roofing/dp/B09FWLQNJG/ref=asc_df_B09FWLQNJG/?tag=googshopuk-21&linkCode=df0&hvadid=696285193871&hvpos=&hvnetw=g&hvrand=9802767183772032476&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1007034&hvtargid=pla-2281435178618&psc=1&mcid=8f955489875e30569d59526589cd66a7&hvocijid=9802767183772032476-B09FWLQNJG-&hvexpln=74&gad_source=1