Bloc Loc’s Half-Square Triangle ruler 8 1/2″ x 8 1/2″ locks onto the seams for instant ruler placement, control so that the seams end in each corner and trims 90% faster than a flat ruler. Ruler rock is gone, too! Also trims quarter-square triangles, birds in the air, y-blocks, LeMoyne Star, double windmill, hidden square units and much, much more. HST ruler is multi-sized and trims in 1/8″ increments. | Contains 1 Ruler: 8.5"
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