Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Does this come with screws?
Document: My use case is a little unique. I have a small wall mounted rackmount network enclosure. I got a shelf for it, but wanted to put some heavy equipment on it that I didn't feel comfortable with just the rackmount screws on the front. I got these and bolted them to the wall right under the shelf so there would be support from the rear as well. I have a UPS and 4 drive NAS on the shelf, and it works great.
These are of very good quality, don't know where they are made but must be a product of U.S.A. I will buy more .
Ordered these to hold up a granite shelf. They are solid. They are clean looking and have a nice industrial look.
I wanted a bracket like this that had no angled support so the space under the shelf was as free of obstruction as possible. These worked great, look good, and are easy to install.
I know this just falls into my lap for ass/u/me-ing, but I bought this assuming it was a pair of brackets.
Answer: no