Saw 
To dream of a saw represents the need to stop an action or deed that you are in the process of performing. The dream may also simply be mirroring the fact that you saw someone or something.
To see an electric saw indicates that you have the ability to face your problems directly and solve them quickly.
Sawdust
To dream of sawdust indicates that a sensitive issue that you thought was resolved has been brought up once again.
Tools
To dream about seeing or using tools symbolizes your proficiencies. You are taking advantage of the implements around you, but you might want to pursue another path.
On the other hand, the tools could mean that some circumstance or affair could require some repair. Freud might say that tools represent the male sex organ and are a symbol of sexual relations.
Boiler
To dream of a boiler means rising stress levels or losing your temper in waking life. Your subconscious mind is showing you a boiler in order to indicate your current emotional status.
Chainsaw
To dream of a chainsaw in your dream implies a significant change or event that will happen in the future. In order to achieve your goals, you must completely apply yourself and use persistence and determination. It may also mean that you tend to tackle problems head on rather than approaching them gradually and cautiously. A chainsaw may also represent the male genitalia and your attitudes regarding sex.
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