Block Loc Half-Square Triangle Ruler, 6 1/2" square
Half-Square Triangle Ruler 6 1/2" x 6 1/2" locks onto the seam for instant ruler placement and control so that the seam ends in each corner. Trims 90% faster than a flat ruler and ruler rock is gone. Also trims quarter-square triangles, birds in the air, y-units, LeMoyne Star, double windmill, hidden squares and much, much more! Multiple sized ruler trims in 1/8" increments.