It's a tank. Very well built. The o-rings keep the cover on tight too.After seeing your post on the case trimmer I looked them up, they seem like a pretty good set up. Looks like they’re well made and should do a good job too.
How hard is it to hold onto the cases once you insert them into the trimmer? I watched at youtube video and one guy had a heavy rubber glove on to hold his.
If you have the drill on a low speed, it seems to want to catch and is hard to hold on. Turning it up, it's not bad at all. My guess the gloves were from the case lube used to re-size. I use Dillon lube and it is a little more tacky. If you were using a gel type, I could see it being a little hard, but still not too bad.