12.5" CROSSHAIR SQ RULER - SPIRAL MARKING WITH 6 &12 POINTS..(CHRS-6-12.5)

8.5" CROSS HAIR SQUARE - 6 POINT..Ruler, 3 (120°), 6 (60°), 12 (30°), or 24 (15°) reference lines (CHR-6-8.5)