30cm (12inch) transparent craft ruler. The Creative Expressions Piercing Ruler features holes at 2mm increments to allow the creation of pierced borders and faux stitching effects on card projects.
Features:

• clear acrylic to easily see your work through the ruler
• a beveled edge for drawing straight lines
• a metal edge for paper tearing
• piercing holes 
• 1/2 inch grid with solid and dotted lines
• measurements in centimeters and inches