Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What size drill bit works for the mounting hardware (anchors) that comes with this?
Document: This rack serves it purpose and works very well for the purpose. One of the wood blocks was a bit loose on arrival, but didn't impact function.
Not the highest quality construction, not the best quality assurance, but in general it looks like what you get here and the metal isn't immediately pliable. It comes with two screws and two dry wall anchors and installation is pretty easy and straightforward.
Good build quality but it felt flimsy until I mounted it on the wall. Screw holes are hard to access without a long drill bit or screwdriver. Looks clean and modern which is what we wanted.
This is a great little key/mail rack! It's very sturdy and looks good. The rack itself is 5 stars but I subtracted one star for the poor quality wall anchors. I had to drill larger than average holes for the anchors and they still bent on contact with a hard surface. Fortunately, I have tons of spare anchors so this was not a problem for me. If you don't have spares on hand, I recommend purchasing your own wall anchors (just the anchors, the screws are fine).
The hardware to hang it was not included. I had to go and buy the screws needed. Not bad quality
its just the right size and very easy to install. i would definitely recommend it to any one. Love the color as well
It looks just like the picture. All hardware is included, and it fits most normal sized envelopes. My wife likes it.
It's a nice brown, but looks a bit scratch on the corner of one of the squares. Looks very nice on my wall
Works perfect and looks just like the picture. Fits perfectly in any space and fits a good amount of mail.
It works and looks good. What else can you say? Sorry, I guess I have to say ten more words.
Answer: I just used a regular screw driver and it worked just fine.