The Ring Ruler: A Size-Adjustable Circular Ruler by Carlos and Frank / Koala Tools.
“In addition to creating perfect circles on the fly, the Ring Ruler also measures circles and 3D objects like cylinders, spheres and cones. In fact, it is really the first and only tool for actually measuring circles and arcs that does not involve calculation.”
(via Indiegogo)
hopy shit
#I could use this on my dick
I came.
…I can’t be the only one who looked at this and thought “One Ring to Ruler them all…” (…can I?)
Wow I want this, why hasn’t this been a thing? I SUCK at finding the circumference of something (and math in general),...
One ruler ring them all
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