The Nautical Solid Brass DIVIDER set is a great addition to any desktop. Handcrafted from solid brass,Brass/ Steel 8 in. Proportional Divider This New Reproduction is a Brass. Proportional Divider, reproduction crafted in the style of a century ago. Adjustable locking nut points on both ends. Nice item to bring back the look or many years gone by. Traditionally proportional dividers are used to increase or decrease the size of a project. As an example, you may want to increase or decrease the size of project by 50%. By using the 1:1.5 setting you can accomplish this task, and 1:2 setting will either reduce it by 1/2 or double it. This item is for the average user, not the person wanting high accuracy like the expensive ones, we sell many of these to schools where teaching with less expensive is important. These are handmade copies of the antique ones used many many years ago. This detailed item measures approximately 8 inches Point To Point and 3/4 inch wide. or looks great as a piece of home or office nautical decor. Manufactured & sold by ARTIZANSTORE.