From the Bendix Scully-Jones company - Industrial Tools Division, this slide calculator/rule gives dimensions for quickly drawing or machining stub tapers. Slide is made of heavy card stock, with grommeted corners, with slide out card stock as well Measures approx 8 1/4 x 4" Looks like this was handed out to employees of General Motors Corp, Chevrolet Motor Div, in Moraine Engine plant, as it has a label on the bottom. I take pride in my pictures, and are a valuable extension of my description. Please take time to see the product fully. Buy with confidence! All items are packaged with great care and shipped next day, excluding any weekends and holidays. I will combine shipping whenever possible as long as the products can be safely packed together. Please be aware, if you have a PO Box, you may receive an additional invoice to cover any additional shipping costs. Please remember to leave feedback, it helps to keep good sellers . International Buyers: We do not mark merchandise as a gift or below value due to it being against US and International Regulations. All custom fees and duties are the responsibility of the buyer. Seller is not responsible for any package held by Customs. If returns are accepted. Must be returned in the same condition as received and in same or similar packaging.