What mounting hardware comes with this box?

The assembly includes the lock mechanism and keys. Bracket or fastener hardware for your specific truck bed or trailer is not included — you'll need to confirm your mounting surface and source appropriate clamps or bolts.

Does aluminum need paint or sealant before installation?

The diamond tread surface is pre-finished and ready to bolt on as-is. Aluminum naturally resists rust, so no primer or paint is required unless you want a custom color match.

Can I use this on a trailer or just a truck bed?

Universal design works on either — truck beds, trailers, or any flat surface where you can mount it securely. Just verify your mounting points have solid structure to handle the loaded weight.