Adjustable Free Angle Circular Saw Guide by Shinwa Sokutei.
In the United States:
https://amzn.to/3zB1A2K (Size: 30 cm) - As seen in this video
https://amzn.to/3MhtmbQ (Size: 37 cm)
https://amzn.to/3Ke7dbM (Size: 45 cm)
In Japan:
https://amzn.to/3zw5xpp (Size: 30 cm) - As seen in this video
https://amzn.to/436ep2s (Size: 37 cm)
https://amzn.to/3KyiTaH (Size: 45 cm)
https://amzn.to/3ZGY5SP (Size: 60 cm)
https://amzn.to/3nKWK0a (Size: 1 m)
These adjustable free angle circular saw guides are one of the most useful tools we use in Japanese carpentry. This tool is great for making angled cuts on larger beams when you can't use a miter saw, but is also very common to use this tool for smaller cuts when a miter saw is not available.
This is a quick use tool that can be stored in your tool bag easily.
In the links above you will see the different sizes available. Please note, Amazon Japan DOES ship overseas.