The Cleary Perfect Slotted Trimmers allows you to cut all four sides of a half square triangle with one easy alignment and two cuts. As a bonus, the edge slots allow you to remove dog ears at the same time, without having to rotate and realign. With the Cleary Perfect Angle, you never have to draw another line! The template clings to smooth sewing surfaces so it is always in position, ready to sew any 45degree angle accurately. Use to make half-square triangles, flying geese, snow balls, miters, and binding. Includes 1/4in and 5/8in seam guides.