Let me start by saying this little tool is a game-changer for anyone working in tight spaces. The Astro Pneumatic 1443B is like the Swiss Army knife of rivet nut setters - compact but surprisingly powerful.

The first thing you'll notice is how small it is at just 7.5 inches. I've used bulkier models before that simply couldn't fit where I needed them to, but this one slips into spots that would make other tools give up. The trade-off? You'll need some serious hand strength, especially with larger rivnuts.

I've personally used it for automotive projects where space was at a premium - think firewall installations and tight engine bay areas. The M4 and M5 adapters worked flawlessly, though I did notice the handles require more squeeze force than larger models when dealing with M6 sizes.

The included assortment of SAE and metric sizes covers most common needs, though I agree with other users that the lack of a case is disappointing. I solved this by using a small plastic organizer from my toolbox - not ideal, but functional.

Where this tool really shines is in its build quality. After setting about 30 rivnuts on a recent project, there was no play in the mechanism and the mandrels showed minimal wear. Switching between thread sizes takes seconds once you get the hang of it.

Would I recommend it? Absolutely - if you need access to tight spaces and don't mind putting some muscle into it. Just be aware that for frequent use with larger rivnuts (1/4-20), you might want to keep your full-size tool handy as well.