Please Note: This item can only be shipped ground to the 48 contiguous states. Some
items cannot be shipped via air due to being flammable, magnetic, contains batteries,
hazardous fumes or where contents are under pressure. Please use a physical address
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The Ring Ruler™ is the first size-adjustable, circular ruler. It has been designed to make the drawing and measuring of circles and arcs a much simpler, more efficient experience by eliminating the cumbersome pivot-point system. Not only is the natural feel of expanding and contracting a circular ruler more ergonomic than using a needle compass, it is also quicker, safer and provides the more useful circular metrics of diameter and circumference (arc length). Rule is 19" long; maximum diameter is 6".
One of the best features of the Ring Ruler™ is its simplicity. This makes it a great learning tool for children – especially ones too young to handle a circle compass.
by Japan Woodworker