I really enjoy working with my hands.  So much so that I became a mechanic.
Mechanics are is a great trade and craft to have. I like using tools to repair all types of machinery.
What's your favorite tool to use?
All types. It takes using many. A mechanic is certified typically by a regional government power or by a trade association.
Yeah, I keep up on my certifications.  I prefer the fairly simple tools. A ratchet is my favorite.
Most mechanics specialize in a particular line of work. Wether it be bicycle, motorcycle, auto, industrial, or diesel. 
I work as an auto mechanic.  What's your specialty?
may be separated into two classes based on the type of machines they work on, heavyweight and lightweight. Heavyweight work is on larger machines or heavy equipment, such as tractors and trailers, while lightweight work is on smaller items, such as automotive engines.
Auto mechanics.
Auto mechanics have many trades within. Some may specialize in the electrical aspects, while others may specialize in the mechanical aspects. Other areas include: brakes and steering, suspension, automatic or manual transmission, engine repairs or diagnosing customer complaints.
Mechanic
A mechanic is an artisan, technician or skilled tradesperson who uses tools to build or repair machinery.
Duties.
Most mechanics specialize in a particular field, such as air conditioning and refrigeration mechanics, auto mechanics, bicycle mechanics, boiler mechanics, general mechanics, industrial maintenance mechanics (millwrights), motorcycle mechanics, aircraft mechanics, bus mechanics, truck mechanics, diesel mechanics as well as tank mechanics in the armed services. 
A mechanic is typically certified by a trade association or regional government power. Mechanics