A pair of the ~LARGER SIZE~ Slotted Trimmers! Set contains both Slotted Trimmer A2 and B2. Trimmer A2 squares up half-inch increments to 10 1/2" (6 slotted sizes). Trimmer B2 squares up full-inch increments to 10" (6 slotted sizes). 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. Other uses include: squaring-up hourglass blocks; strip piecing hst; strip/tube method of block construction; and fussy cutting