Alvin - Parallel Glider 10 In

Parallel Lines with Ease - Quickly and consistently draw parallel lines for various projects including illustrations, construction details, mechanical drawings, technical sketches even calligraphy. Durable Acrylic - The crystal clear acrylic is designed for toughness and precision and comes with under inking. Smooth Gliding Action - Move and use with ease with the aluminum and non-skid rubber rollers. You can continue using this without lifting it your drawing surface. Multipurpose Tool - Because of the all-in-one design and function this can transform to anything you need for your drawings and drafts. Detailed Instructions - Don't worry about getting confused and overwhelmed about the functions, each glider comes with detailed instructions in the package.