The Hi-Pro Machine Key 3/8 x 1-1/4 Carbon Steel by G L Huyett is designed for secure shaft-to-hub connections. This key measures 3/8 inch in width and 1-1/4 inches in length, crafted from high-quality carbon steel for enhanced strength and wear resistance. Its design allows for optimal performance in various mechanical applications, ensuring reliable torque transmission. This machine key is ideal for use in motors, gearboxes, and other machinery where dependable performance is essential. It complies with industry standards, making it a trusted choice for both industrial and commercial use.