Does this require drilling into my truck bed?

Mounting method is not specified in the product data. Test-fit the box on your bed rails before deciding whether to use clamps, U-bolts, or drill-down fasteners — different bed styles call for different approaches.

Can I use this with a tonneau cover or bed cover?

Crossover design means it sits at bed width, so you'll need to confirm clearance with your specific tonneau or cover model before purchase. Some covers sit above it cleanly; others may bind depending on height and hinge design.

What if the lock or hinges fail — is there a warranty?

Warranty details are not included in the product specs. Reach out to ModSupply directly with your order number to confirm coverage and return options before installation.