Can this saw cut wood?

No. It is an abrasive cut-off saw meant for metal such as rebar, pipe and angle iron. Abrasive wheels are not safe for wood; use a miter saw with a carbide blade for lumber.

What size wheel does it take?

It uses standard 14-inch abrasive cut-off wheels with a 1-inch arbor, the common size sold for chop saws. That makes replacements easy to find at hardware stores.

Does the bevel adjustment let it cut angles?

Yes. The base bevels so you can make angled cuts on metal, which many basic cut-off saws cannot do. Check the angle scale and test on scrap before critical cuts.

Is it the same as a miter saw?

No. A miter saw spins a toothed blade for wood; this saw spins an abrasive wheel at high speed for metal. It cuts slower and leaves rougher edges but handles steel a wood saw cannot.

What should I wear when using it?

Safety glasses or a face shield, hearing protection and gloves. The saw throws sparks and grit, so keep flammable material clear and clamp the work securely.