Alvin - Parallel Glider - 10 inch - The Alvin Parallel Glider is an easy-to-use instrument that combines the functions of a parallel straightedge, triangle, protractor, T-square, and compass in one. One of the most useful and convenient aids for drafting, drawing, and nautical applications. The Parallel Glider has smooth gliding action to easily make parallel lines without twisting or turning under accidental pressure. Features durable acrylic blade with printed graduations, through-holes at + inch increments for drawing circles, and a comfortable aluminum roller bar with non-skid rubber O-rings for a firm grip on any surface. Available in both 10 inch and 14 inch lengths in metric and inch versions. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.