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

8.5" CROSS HAIR SQUARE - 5 POINT ..Ruler 5 (72°), 10 (36°), or 20 (18°) reference lines (CHR-5-8.5)

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

8.5" CROSS HAIR SQUARE - 8 POINT..MARKS BLOCKS UP TO 8". (CHR-8-8.5)