I just find a good tool for daily life - easy angle ruler template measure tool 90 degree for handymen, builders and craftsmen only for £4.99. Hope this will help people who need it.

The Angleizer four-sided ruler mechanism slides and locks into any desired angle as a reusable stencil for endless applications. Material - plastic.

Main Features:
The new angleizer template tool is perfect for precise and accurate angle measurements
The multi-angle template tool saves your time and effort. With the angleizer, you can measure awkward and hard angles effortlessly.
Set at 90-degree angles to space parallel pieces, easy to make repeat cuts on arches and joists.
Each button inside contains metal screws that will effectively prevent loosening and wear,more stable and more durable.
The Angle-ruler folds for easy storage and utilizes a unique tightening mechanism for one-handed operation.