At first glance, the bomb squad and a HAZMAT team formed the view it was a dangerous bomb, at risk of exploding into a fireball at the slightest shock.

But in the end, after a major metropolitan police station was evacuated, two police officers were taken to hospital and a man was arrested amid terrorism fears, its suspected maker revealed it was nothing more than a homemade sex toy.

The man, from south-west Sydney, was arrested and questioned after police found the "bomb". Credit:Facebook

Forensic testing will now help police confirm whether the man behind this puzzling item, found during a raid in Sydney's south-west, was honest in his claim that his craft had nothing to do with explosives.

Despite the bizarre case of mistaken identity, formed after advice from the NSW Police bomb squad and Fire and Rescue's HAZMAT unit, police are still trying to answer one question.