This video has dryer vents as well as plumbing and electrical vents. If you want more information on the snips I use you can find it here.https://youtu.be/gvoyPy62Lyo. I would also note that i had raised metal underneath the sides eliminating the need for sealant on the sides. If i did not have that much metal or without a raided area i would have also used sealant there.