The Machine Key M4 x 4 x 25 Form B is manufactured from Cbn steel with a zinc clear finish, providing durability and resistance to wear. This undersized key measures 4 mm in width, 4 mm in height, and 25 mm in length, making it suitable for various mechanical applications where precise alignment is crucial. It meets industry standards for quality and performance, ensuring reliable operation in machinery and equipment. The key's design allows for easy installation, making it a practical choice for engineers and technicians.