Does it have enough torque to loosen tight bolts?

No. It is a ratchet, not an impact wrench. Break tight fasteners loose by hand or with an impact tool first, then use the ratchet to run them out.

What comes in the kit?

The kit includes the ratchet, an M12 battery and a charger. The bare tool version is sold separately for owners who already have M12 batteries.

Will my existing M12 batteries work with it?

Yes. It runs on Milwaukee's M12 12-volt batteries, so packs from other M12 tools fit.

How does it compare with an air ratchet?

It removes the hose and compressor, so it is easier to carry and use away from a shop air line. Air ratchets can still be lighter and cheaper to run in a fixed shop.

Is the head small enough for tight spaces?

Milwaukee calls it the most compact head in its class, and owners confirm it fits many spots a full-size tool will not. Some very tight clearances still need a hand ratchet.

Is it worth it for a home mechanic?

For occasional jobs a hand ratchet may be enough. The speed pays off for anyone doing repeated fastener work, especially if they already own M12 batteries.