How to make a right angle corner clamp

I made a versatile right angle corner guide. [Tools and jigs used] ・ Battery type air compressor コ ン プ レ ッ サ HG-DC1090BT https://haige.page.link/JSK_hg-dc1090btn ・ Air finish nail https://amzn.to/2GGT07a ・ Clamp: EIGER TOOL Precision Clamp M-1 https://amzn.to/3b0ZCLu ・ Circular saw slide guide https://youtu.be/M1xYKw5FP-0 ・ Disk sander https://youtu.be/KaojkUzeEJU