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Since it is difficult to find the center point of a cylinder with a circular cross section, we need the help of such a tool. With this tool you can easily find the center of a cylinder circle. It is extremely easy to find the centers of not only cylindrical objects but also angular objects.
You can see how I made this tool and how I use it when you watch the video. If you're a DIY enthusiast, you'll love this tool.
Enjoy.
Making Video :
In this video, I make an adjustable drill bit. I start by using the metal I cut from the M12 bolt. Then I am cutting a Spade Drill Bit. Then I combine the two.

I build a 3 in 1 workbench. Wonderfull workshop table for homemade DIY projects. Homemade table saw, jigsaw table and router table ALL IN ONE !