Universal rule for patchwork.Permet to: Check the sewing supplement with the patchworkControlling the sewing supplement with the work to apply a seam for the installation of a zipper to the line of the hem for right -handed and left -wing material thick and resistant guaranteeing a safe traced of the rotary knife. Precise marking by computerized laser impression on the back of the rule. Employment for supplies, bias, equilateral triangle, hexagons, etc.