FBX900 Fan/Fixture Box

I recently bought an elegant chandelier for $387. I decided to place it in my living room. As a result, I called the expert to have it installed. What a good idea that they install it between two rafters using FBX900 Fan/Fixture Box. Usually, I've noticed that chandelier gadget is mostly placed directly in the ceiling. But the home expert said that it is better to have an expandable brackets that securely mount the chandelier between joists, eliminating the need to cut and nail 2x4s to the fan or fixture.

What a delightful idea! I appreciate their intelligent work.