The StabilaÃ‚ Engineers Rule 1/16-, 1/10- and 1/100-Scale Folding Rule is ideal to use in many different work environments, especially for ensuring the accuracy of plan scales. This Stabila folding ruler features increments marked at three different scales for exceptional versatility. Heavy-duty spring hinges lock the ruler segments into place securely. This engineers folding ruler has fully sealed rivets that protect from corrosion due to water or weather conditions. Its made from genuine beech wood for exceptional sturdiness and abrasion resistance. The ruler folds up into a compact form when you don't need it, which makes it both easy to store and highly portable. Stabila certifies this rulers accuracy so you can rest assured of correct results the first time around.