Bloc-Loc 4-1/2" Half Square Triangle Ruler

Bloc-Loc’s Half-Square Triangle 4 1/2" x 4 1/2" ruler locks onto the seam for instant ruler placement and control so that the seam ends 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.

Bloc Loc