Instruct: Classify the given Amazon review into its appropriate rating category
Query: No Mounting Screws Included - you will need to buy them, No response from seller

Item arrived with 1) parts missing 2) set screw "rattling around inside" 3) no instructions or documentation. The missing part is what is needed to secure the ends of the light to the ceiling. I assume that a hanger bolt would work and with no instructions or documentation, it is quite difficult to tell how they recommend mounting this thing. It does flex, so you must affix the mounts to the ceiling or it will sag. I contacted manufacturer about the missing parts and they asked me to take a picture of the missing parts, which I find to be both disturbing and humorous. I replied with further detail about the set screw inside one of the channels and lack of mounting hardware. It is now day 3 and I have not heard from them with the exception of an offer to have professional installation for $120. I don't need a pro installer. I need two, 3-inch hangar bolts with an M4 thread. Update: I was able to pop off the channel and retrieve the threaded set screw. I will go to a hardware store and purchase two 4M hangar bolts and hope for the best. One picture will show one side where the mount was attached correctly One picture shows where the set screw should go (it is inside the unit) One picture shows where the set screw should be and the mounting screw that needs the set screw