Easy to Use - This 6 inch compass comes with interchangeable pen pencil and divider parts that switch out effortlessly. Ideal for Students - Perfectly useful for all levels whether for geometry class drafting architectural design construction or engineering. Extra Parts - Has a split-leg design for interchangable pen pencil and divider parts. Also conveniently includes a spare ruling pen needle point and bolt as well as extra lead. Stays in Place - Designed to perform consistently over time includes sharpener for lead point to always be able to create precise arcs and circles. Also includes a small container for extra lead. ALVIN has been the professional s choice for drafting tools and drawing supplies for over half a century. Since 1950 we have been known for our wide selection of high-quality products at a fair price. Our tools help bridge the gap between ideas and innovations. Proudly Made in Germany