Do I need to use jack stands with this, or can I work underneath it solo?

Always pair this jack with proper jack stands rated for your vehicle weight. A jack is a lifting tool — stands are your safety system. Never work under a vehicle supported only by a jack.

Will this jack fit under my car's pinch welds, or is it too tall?

Bottlejack height and pinch-weld clearance depend on your specific vehicle — measure your clearance before purchasing. Bring dimensions or test-fit at pickup if possible.

What maintenance does this need to stay reliable?

Keep the hydraulic valve clean and dry, wipe the rod after use to prevent corrosion, and store in a dry space. Hydraulic fluid doesn't need regular topping — only if you notice pressure loss over time.