Ideal for the writing needs of the Blind and Visually Impaired. Whether you want to address an envelope or label, sign your name, or for any number of writing needs where guidance may be required, the adjust writing guide is the perfect tool for the job. Use it to write in upper or lower case. Easily adjust to the desired writing width by simply sliding the right margin guide from side to side. Built-in notches along the upper track hold the margin guide firmly in place at half-inch intervals up to a width of 8-1/2. Lightweight and easy to carry with you. Black plastic frame. White plastic margin stop with metal clip/margin lock. Measures 9-3/8 x 1-1/2. Weighs 1.6 oz.