Medium geometry set includes vital tools for technical drawing. Set includes an 8" ruler, 6-3/8" triangle (30-degree/60-degree/90-degree), 4-3/8" triangle (45-degree/90-degree), and 4-3/4" protractor. The ruler features 1/16" graduations highlighted in a bright color on one side for easy identification and millimeters on the other edge. The triangles have inches with 1/16" graduations and centimeters with millimeters along the other edge. Tools are made of plastic. Compact set fits in most pencil cases.