Easy, efficient and accurate way to square-up half-square triangles. Align the seam of an unpressed half-square triangle with dashed lines and with easy strokes, trim all four sides. Edge slots allow for trimming of the dog ears at the same time. Also can be use to square-up hour glass blocks, strip piecing of half-square triangles, strip-tube method of block construction and fussy cutting. Set of two acrylic templatesTrim up to 11 Sizes :1-1/2" to 6-1/2"1-1/2" to 6-1/2"