The Hi-Pro Machine Key, measuring 1/4 x 1-1/2 inches, is made from high-strength carbon steel, making it an ideal choice for various mechanical applications. This key is designed to fit securely in keyways, ensuring a strong connection between rotating parts in machinery. Its robust construction provides excellent resistance to wear and deformation, making it suitable for high-torque environments. This machine key meets industry standards for quality and performance, ensuring reliability in various mechanical systems.