The Omnigrip 16.5in square has a diagonal line for triangle cuts; the ruler has extra 1/2" on two sides for seam allowance. Use for quilting, sewing and crafts - or any DIY project that calls for cut fabric. Use with a rotary cutter or a straight-edge blade. Patented non-slip backing to hold ruler in place during cutting.

• Color: Clear
• Made of: Acrylic
• Use: Quilting Ruler
• Size: 16.5in x 16.5in
• Included: One Ruler