This ruler allows users to determine radii for drawings without expensive tools, adjusting from 6 3/8" to 200" to find the radius of existing curves, center lines, points, or determine curves needed to connect existing points and lines on a drawing.

1. A ruler that eliminates the need for a beam compass or expensive curve sets. It can be adjusted to any radius,
from 6 3/8" to 200" (17cm to 500cm), to determine the radius of an existing curve for dimension drawings, to
find center lines and center points, or determine what a curve must be to fair in existing points, or lines, on a
drawing.