R-129 HIGHWAY SMALL RADIUS GUIDE
For use by highway and road departments in layout of interchanges, intersections and many other areas. 33 radii of less than 4" with scale markings at 20', 50' and 100' to the inch. Automatically locates center of each radii. Size: 7 3/16" X 10".
Thickness: .030". Supplements No. R-127 Civil Engineers' Radius Guide.
DISCONTINUED Available to special order