Description: The Manfrotto 013 adapter is a standard 16mm adapter with external threads of 1/4 and 3/8 inches, commonly referred to as a finger. This adapter serves as a connecting tool for various accessory groups with internal threads. For instance, the finger allows you to connect accessories like a shoulder mount (with an internal thread) to an external monitor or a camera. It acts as a versatile connector, facilitating the combination of accessories with compatible internal threads.