the design of the ‘rollbe’ ruler by toronto-based the work of mind inc allows it to be rolled from point to point taking an accurate measurement in the metric or imperial system. designers, carpenters, fashion designers, sewers, architects and many other professionals draft specific layouts and templates where measuring curves and design details is necessary. its two smallest sizes, 4 inches and 10 cm are both comparable to the size of a coin making it comfortable to carry in a pocket or key chain.
the two larger sizes of ‘rollbe’ at 8 inches and 20 cm are perfect for use at home or in tool boxes. all rulers are made of high quality stainless steel and the 4 inch and 10 cm versions come with leather key chain carrying cases. the inch versions of ‘rollbe’ are accurate to a 16th of an inch, while the cm versions are accurate to the millimeter. the design is super easy to use. simply place the bullet – start mark on the starting point of the surface or line you want to measure then roll and count full rotations by following the ‘radius indicator’, then add remaining units.
from designboom
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