Feature●Provides an easy solution to adding follow focus on lens; 3x bundle●Securely and easily fastens to lens diameters 20mm up to 90mm●Can be used for Focus, Zoom or Aperture control●Extremely lightweight, only 0.5oz; durable and convenient●Limited 2-Year Manufacturer WarrantyDescription A smooth zoom or follow focus is necessary when filming and the Fotodiox focus handle is perfect for this. The silicone rubber ring is stretchable and has seven holes that allow the photographer to adjust the handle to fit lenses with a diameter of 20mm up to 90mm.