The Dietzgen 1771 Redi-Rule Pocket 5" Plastic Slide Rule is a collectible tool made in the United States, perfect for engineering and science enthusiasts. This slide rule comes with a leather sheath for easy storage and protection. The compact 5" size makes it convenient for on-the-go use, while the high-quality plastic construction ensures durability. Ideal for fraction, decimal, and trigonometric calculations, this vintage tool is a practical addition to any collection of slide rules or classic calculators.