Westalee 8 Point Cross Hair Square 8.5: Mark 4 (90°) or 8 (45°) or 16 (22.5°) or 32 (11.25°) reference lines.
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