The Woodruff Machine Key 3/16 x 1-1/4 is made from high-quality alloy steel, providing excellent strength and durability for various mechanical applications. This key is specifically designed to fit into a corresponding slot in a shaft, ensuring a secure connection between rotating components. With dimensions of 3/16 inch in thickness and 1-1/4 inches in length, it is perfect for use in machinery where precise alignment is crucial. The alloy steel construction offers superior resistance to wear and deformation, making it a reliable choice for demanding environments.