Will these work on interior trim clips and panel fasteners?

Yes. The mixed set covers Phillips and slotted heads commonly found on door panels, dashboard trim, and console fasteners. The black oxide tips grip tight and reduce the chance of cam-out on worn slots.

Are these tips magnetic or will they strip fastener heads?

Tips are black oxide steel with no magnetism. They're hardened to resist slipping and wear on repeated use—apply firm downward pressure when turning to avoid stripping the fastener head.

Do I need any additional tools to use these, or is this a standalone set?

This is a complete standalone set for most interior and fastener work. For larger jobs requiring torque specifications or specialty bits, you may want a torque wrench or impact-rated set on hand, but these handle standard automotive bolt removal and installation on their own.