3/8" drive air ratchet. Well made, strong, and durable. Great brand in matco. I purchased this when I was working at a shop and never turned a nut or bolt with it. Changed careers not long after when another opportunity fell in my lap. So it's a nice tool unused just out of the box. See photos for specs.
It's north of 400 when I bought it. I'm sure you can cross ref. Their website and confirm that.