The Machine Key 7/8 x 7/8 x 4-1/8 Form B is a robust carbon steel component designed for high-performance applications. With dimensions of 7/8 inch in thickness and width, and a length of 4-1/8 inches, this key is ideal for larger machinery requiring secure torque transmission. The carbon steel material provides excellent strength and wear resistance, ensuring longevity in demanding environments. This key meets industry standards for quality and safety, making it suitable for various mechanical assemblies. Perfect for industrial and automotive applications, it is a vital addition to any technician's toolkit.