The Omnigrid 9-1/2 x 9-1/2 ruler is an excellent square-up tool; it features a ½ seam allowance on 2 sides; it is used for cutting triangles and borders, and to cut and square blocks 9-1/2 and under when quilting.
In general, Omnigrid square rulers are used for secondary cutting of strips, and to square up finished quilt blocks
Use with a rotary cutter or a straight-edge blade
The 9-1/2 x 9-1/2 ruler has the following standard Omnigrid features:
Diagonal angle line
Edge markings for accurate measuring
Laser cut edges for smooth, deep cutting
Patented double-sight lines that show up on light and dark fabrics
Heavy-duty durable acrylic material
Left- and right-hand numbering and angle system