Review on 📏 GMAMECL Clamshell Ruler - Optimal Measurement for Precision by Denise Davis

I'm new to using rulers. These rulers are well marked and have a slightly roughened back to keep them in place on the fabric. I was able to make rows of cots by lining up the ruler with a marked Frixion line. After that I was able to easily duplicate a set of cribs - either an identical duplicate or a duplicate offset by half the length of the crib - with ease. I only marked the line once. This is a great product.