I received most of the duct work for my dust collection system this friday so this weekend is being spent doing the install. I was going to install it using sheet metal screws but I thought I would give pop rivets a try; boy am I glad I did. Anyhow, the photo shows some of the tools I'm using for working with the ductwork. In the upper left hand corner (red handle) is a crimper for making the serated ends like you see on the left side of the wye, very handy for making small extension pieces. In the upper right corner is a rivet gun, I like this thing, slip the nose over the shaft of the rivet, pull trigger, and bam! rivet is popped ! Vastly supperior to using a hand riveter. In the lower right is an air drill, I got this as part of a set (I'm trying out air tools in the shop to see if I like them). It is a bit smaller than a cordless and can get into some tighter places. The last tool is a sheet metal shear, this particular one is an inline version ($25 on sale at HF). This is much handier at cutting metal than a jig saw and leaves a nice flat edge (no curling). I'm becoming a fan of air tools, the riveter and metal shears have really saved a lot of time in preparing and attaching ductwork.