🔍 KOALA TOOLS, Ring Ruler 360 - Adjustable Circle Stencil & Templates Tool, 3"-6" Diameter – Geometric Tool for Drawing Circles Review

It was fast delivery. The product slips during use, making it useless for measuring round objects or as a guide.

Where it fits together, there's a bulge in the circle. You have to move the ruler to make the whole circle. No, I would not buy it again.

Everything is fine. It's much easier to just use a traditional compass as it will move a lot if you edge your circles with any force. Great oval maker!

I've noticed that when I use this ruler on hard surfaces, it moves a bit and becomes unwieldy. However, if you want to make circles with soft materials like foam, I recommend this. I use it when I need to make foam circles and it works great.

Used for measuring in ceramics. That's not bad, but I've found it's a lot easier and faster to look for the same diameters/circumferences with a rope. It might be useful for other art projects in the future so I kept it.

Slightly tight for smaller holes (<2"), often snaps open (but does not break, dovetail to allow sliding to change diameter). I'm sure the good old compass is still good for something like this. Returned a few days later.

As a comic artist, this ruler comes in very handy for creating round objects like spheres, planets, lights, radial construction lines and even explosions. I like that I can use my drawing hand to control the pressure of the line as I draw, as opposed to a compass. Also, it doesn't leave holes in my paper, which is cool too. I only wish they made a smaller version for 1 to 3 inch circles.