Metric Wood Folding Ruler (10-Pack) Universal Upsell Accessory It has a visual indicator

It has a visual indicator when the device is out-of level

With 91 built-in scales

this kit also comes with a magnetic target

This wood ruler enables the artist to draw straight lines without the use of a chalk line or a mason's line

Through the special rail equipped

Metric Wood Folding Ruler (10-Pack) Universal Upsell Accessory It has a visual indicatorThe Keson Metric Wood Folding Ruler has long been an essential tool for carpenters, masons, plumbers and all types of tradespeople. It extends up to two meters long and is 5 8 inches wide. This wood ruler enables the artist to draw straight lines without the use of a chalk line or a mason's line. The Keson wood ruler steel springs have a precision lock action for extra strength when extended. Its cleanly machined edges allow the rule to be snapped