Control the spread of light from your flash using the JJC 3-in-1 Honeycomb Grid for the Canon 600EX-II RT flash. The JJC 3-in-1 Honeycomb Grid is designed to create three different sizes of light spread (small, medium and large). When you stack two grids, you can provide light to the smallest spots. Stack the small grid in the ring to get large light spots, for medium-sized light spots use the larger grids.
A grid is placed by inserting the grooves on the side of the grid into the grooves on the inside of the ring. Then press the grid until it won't go any further. To remove the grid, push it out of the ring from the back.
Attaching the grid to your flash unit
Attach the JJC 3-in-1 Honeycomb Grid to the flash by placing the flash head in the flash bracket
Screw the grid and flash mount together stack the grids you need in the ring
Screw the ring onto the grid mount until it won't go any further