Half Square Triangle Ruler Bloc Loc

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 more. HST ruler is multi-sized and trims in 1/8″ increments.