The easy and accurate way to add a seam allowance to your patterns, this simple tool helps you to smoothly draw around your templates without having to rely on your eye! Place a sharpened pencil or marking pen in the central hole, gently press the side of the circle to the edge of your template and then draw - this handy circle will roll around the edge adding a 6mm seam allowance to any shape your draw. Particularly useful for curved pieces used in drunkards path and clamshell quilts, this is one little tool a quilter can't do without!