The APH Glue Down Rule, model 1-03081-00, is a tactile rule designed for use by individuals who are blind or have low vision. This brass ruler has raised lines at 1/8 inch intervals. It can be bonded to sewing machines, band saws, cutting or drawing boards, etc. This ruler is sold in packs of five. DIMENSIONS (HxLxW): 0.01 x 12 x 0.5 inches.