Accurate for both inside and outside measurements, a folding wooden rule has always been a staple in a finish carpenter’s toolbox. Unfortunately, this tool is often expensive, fragile, wears quickly and becomes water stained easily.
The 6' ABS folding rule has all the advantages of a wooden folding rule, but none of the disadvantages. Rule features engraved graduations in 1/16" increments and snap locks which secure each section in the closed and extended positions.
The little mini rule is the handiest tool. It folds down to 2-1/2" and has a sturdy key chain attached so you have it with you when you need it. Graded on both sides in increments of 1/16", it is 19" long when fully extended.