Will this bolt to my truck bed rails directly?

Crossover boxes are designed to sit across your bed frame, but mounting method varies by truck platform. You'll want to test-fit before committing to fastener locations — some setups use existing bed holes, others may need new drilling.

Does the lock come ready to use or do I need to set it up?

The keyed lock is included and functional out of the box. You get two keys with your purchase — no setup required beyond test-fitting the unit to your bed.

Can I paint this black aluminum to match my truck bed color?

The black finish is factory-applied. If you want to repaint, light surface scuffing and a quality automotive primer will prep it for paint — follow your paint manufacturer's guidelines for adhesion on aluminum.