Use the Fons and Porter Acrylic Binding Tool to achieve smooth finishings for binding ends every time Features: diagonal sewing line, trim guides at 1-3/4, 2, 2-1/4, and 2-1/2-Inch. Constructed of clear acrylic with black markings. Tool measures: 3-3/4 by 3-3/4 by 1/8 inch.