Will this bolt to factory bed rails or does it need drilling?

Designed for DIY installation with basic hand tools. Test-fit before committing to fasteners — mounting method specifics aren't documented here, so verify clearance and anchor points on your truck bed first.

Does it come with clamps, brackets, or hardware?

The tonneau cover assembly ships as a complete unit. Fasteners and mounting brackets are not confirmed in the product specs — source separately or confirm before ordering if hardware is critical to your install.

Can I leave this on during a car wash or heavy rain?

Hard panel construction is weather-sealed when closed, but full immersion or pressure washing is not recommended. Roll it up in heavy downpours to avoid water pooling along the seams.