Set of 3 Phi (Golden Ratio) Rules

Phi (also known as the golden ratio) is a value of approximately 1.618 used by architects and designers to give their work aesthetically pleasing proportions.

In woodworking, tabletops are often about 1.6 times longer than wide, chair backs are usually 1.6 times taller than the legs, and drawer proportions are also based on Phi. In turning, use of Phi helps guide height vs. diameter proportions.

Our rules simplify Phi calculation and proportioning during design. They have a dual scale with normal graduations on the top edge and Phi-scale graduations on the bottom edge. One face converts a known long measurement to an unknown short measurement, and the other does the opposite. To scale a measurement, you simply find the identical measurement from the top scale on the lower scale.

The hardened stainless-steel rules have a matte finish, ground edges and black-filled etched markings. Excellent layout aids, they come as a set of three containing 12", 18" and 24" rules.