These are the gold standard for heating a fastener while minimising damaging to the surroundings, except if there are delicate electronics nearby. The downside is, they are VERY expensive. Consider this option only if you are a pro or very active DIYer... or loaded!

• Heat fasteners.

• Heat shafts.

• Heat assemblies.

• Buy the most compact but powerful one.

• Always wear eye protection

• Always use welding gloves

• Always use shock protection