Westalee 6 Point Cross Hair Square 12.5: 3 (120°) or 6 (60°) or 12 (30°) or 24 (15°) reference lines great for Hexagon quilt patterns.
Other Cross Hair Squares Available in 3 styles and 2 sizes.
Reference lines give much more accurate spacing when quilting, particularly when using rotating templates. Use the Cross Hair Square to locate the center.
Designing with Crosshair rulers
How to use a Crosshair Ruler