Quilters Select Non Slip Ruler - Alex Anderson

Features easy-to-read lines for marking and measuring fabric, as well as multiple angles. Each ruler has a unique non-slip coating that makes for more accurate cutting! The one-inch lines with two sets of corresponding numbers that are placed around the perimeter of the ruler can be read left to right AND right to left – which means you never have to lose your place or count backwards! Makes squaring blocks easier than ever! Available in multiple sizes.

• Easy to read lines for marking and measuring your fabric - 1/8”, ¼”, ½” ¾” and 1” markings as well as multiple angles.
  
• Unique Non-Slip Coating
  
• One inch lines with two sets of corresponding numbers are placed around the perimeter of the ruler and read left to right and right to left – never lose your place or have to count backwards!
  
• This ruler features an exact measurement around the perimeter – no more accidental cuts and squaring your blocks has never been easier!

More info here