What is the difference between detachable and adjustable blades?

Detachable blades are designed to be removed from the clipper in seconds without tools while an adjustable blade is affixed to the clipper with two screws. With detachable blades the length of the hair is achieved by changing out the entire blade. With an adjustable blade, a rage of hair cutting length can be achieved by adjusting a lever on the side of the unit. Plastic attachment combs are available for both types of blades.