What fasteners do I need to mount this to my truck bed?

Mounting hardware is not specified with this box. Assess your truck bed's surface — most aluminum boxes bolt through existing tie-down holes or require drilling. Bring your truck bed dimensions when you install to confirm anchor points.

Can I paint or seal this aluminum box?

Aluminum accepts paint well, but the box ships unprepared. If you plan to paint, light surface prep will help adhesion. If you want to leave it raw, the aluminum will patina over time but won't rust.

Does the lock come with multiple keys?

You get one lock and one key with the box. Order a replacement key blank from the manufacturer if you need a spare or lost the original.