Amazon, QEP diamond hole saw kit. We did ours for water filtration as well. There is also a YouTube instruction video, very easy, takes about 30 minutes. We used a cordless drill, did not even need a real drill. Cost $20 and 30 minutes.
【在 w********s 的大作中提到】 : Amazon, QEP diamond hole saw kit. : We did ours for water filtration as well. There is also a YouTube : instruction video, very easy, takes about 30 minutes. We used a cordless : drill, did not even need a real drill. : Cost $20 and 30 minutes.