Tailoring Ruler French Curver Arm Hole Styling Design Ruler, Unbreakable Plastic Plastic template French Curver Styling Design Ruler, Tailoring Ruler, Arm hole curve Use for pattern alterations, garment alterations, or anytime a curved or straight edge is needed The ultimate tool for designing and altering patterns and garments Made from transparent flexible unbreakable plastic. Seemingly flimsy, but unbreakable. The rate of transparency allows to see the drawing medium below template for easy positioning.