Drilling Holes for my intake and exhaust

Hello fellow smokers and growers,

I am a noob and setting up my first grow box. I've got everything handled except the intake and exhaust holes. I have a question concerning the exhaust fan, what type of drill bit do I need to use to install a 4" inline duct fan?

Thanks and I'm looking forward to your responses!

you need a 4 inch hole saw, they are pretty expensive so look first at pawnshops

Something like this.

http://www.homedepot.com/Tools-Hardware-Power-Tool-Accessories-Drill-Bits-Hole-Saws/h_d1/N-5yc1vZ1xloZb8nb/R-202327761/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

Thank you guys so much! I actually have one at my parents house!

how bout a jig saw and a small drill bit rather them buy a $50 hole saw as well as the hole saw key which is $30

LT1RX7 Drifter said:

how bout a jig saw and a small drill bit rather them buy a $50 hole saw as well as the hole saw key which is $30

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i dont think he said he had a jigsaw,but if its drywall you can scribe the circle and pop it out