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Rad ruler
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Rad RulerA compact and practical 3D-printed radius ruler for measuring internal and external curves with ease. This tool covers diameters from 1mm to 22mm in precise 1mm increments, making it ideal for modeling, woodworking, metalwork, or 3D design. The stepped concave edge allows for quick identification of radii, while the built-in hole makes it easy to hang or attach to a keyring or lanyard. A must-have addition to any maker’s toolkit.
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