This is the Dedolight 8-Leaf Barndoor Set with Gel Clips. Barndoors narrow the beam spread of a light fixture. They help create a 3-dimensional look to a lighting scheme by placing light in a specific area or by keeping it away.
The small leaves of this barndoor set have two helper leaves, which add more control of the light emitted from the fixture. Each large leaf has two clips for attachment of gel filters.