The Woodruff Machine Key 3/8 x 1-3/8 is crafted from durable carbon steel, designed for precise alignment in rotating machinery. This key features a semi-circular shape, measuring 3/8 inch in width and 1-3/8 inches in length, making it ideal for use in applications requiring a secure fit in keyways. Its robust construction ensures longevity and reliability, making it suitable for various industrial and automotive applications. This Woodruff key meets industry standards, providing a dependable solution for maintaining component integrity.