This is a high-quality lift arm pin from Koch, with a 5/8 inch diameter and an overall length of 3-7/8 inches. It is designed for use with the Koch 4023013 lift arm and is ideal for towing parts and accessories. The pin is made from durable materials and is easy to install, providing a reliable and secure connection for your towing needs. This product is perfect for anyone looking for a top-of-the-line lift arm pin for their towing equipment.