Seven THREE-QUARTER INCH sizes: squares from 1.75" to 7.25" blocks. Purple print to easily differentiate from the original Slotted Trimmer sizes. EASY, EFFICIENT and ACCURATE method to trim and square-up half-square triangles. INSTRUCTIONS ARE PRINTED on these quilting rulers, so you never have to look for instructions. One alignment. Two Cuts = trims all four sides of half-square triangles. Makes cutting quilt pieces go faster. Exclusive edge slots removes dog ears at the same time. Makes the assembly of quilt pieces more accurate. ~Trimmer D~ Trims in THREE-QUARTER INCH increments from 1.75" to 7.75". Purple print for easy identification from original trimmers. An easy, efficient and accurate way to trim half-square triangles. Align the seam of an unpressed hst with the dashed lines and with 2 easy strokes, trim all four sides. The exclusive edge slots allow for trimming dog ears at the same time. There's no need to rotate and realign fabric. Trims 7 sizes. Other uses include: squaring-up hourglass blocks; strip piecing hst; & strip/tube method of block construction.