How to make a hole in Granite bigger?
I have a new bathroom counter top with a 1 1/4" hole for the faucet. I have a new 3 hole faucet and tried to install it today. I didn't realize that the faucet requires an opening of 1 3/8" and the existing hole is 1 1/4". What is the most cost-effective way to make the hole a little bigger? I've already tried using a step bit on a drill, using a metal file, but have not had any success.
I noticed some "diamond tool drill bits" on ebay for around $18 and was wondering if that tool that will get the job done (I wasn't sure if I am allowed to link to ebay on here). When I called HD, they said they had a bit for about $60. I will probably only use this thing once, so I don't want to spend more money than really needed. These can be used on a regular 1 1/2" drill, correct?