Description
The Omnigrid 6½" x 6½" ruler is a popular baby quilt block size; it features a 3” x 3” section of 1/8” grid markings, and a ½” seam allowance on 2 sides; it is used for cutting and checking half and quarter square triangles.
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In general, Omnigrid square rulers are used for secondary cutting of strips, and to square up finished quilt blocks 
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Use with a rotary cutter or a straight-edge blade 
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The 6½" x 6½" ruler has the following standard Omnigrid® features: 
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Diagonal angle line 
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Edge markings for accurate measuring 
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Laser-cut edges for smooth, deep cutting 
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Patented double-sight lines that show up on light and dark fabrics 
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Heavy-duty durable acrylic material 
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Left- and right-hand numbering and angle system 

 
                        
                      