Fire Safety Stick ExtinguisherHow does the Fire Safety Stick it work? The Fire Safety Stick (FSS) is a manual, portable fire extinguishing device. It uses a Potassium powder jet (a unique method among conventional fire extinguishers) that employs the vaporisation of the powder in the environment followed by the condensation of its extinguishing substance. It works by interrupting a fires chain of reaction (the auto catalyst of the fire). Fire Safety Stick is composed of stable,