Article: These shears are very versatile, and are able to cut about 40-70% of hair off in a few quick cuts.  They can be used to add a level of texture, or naturally blend different levels of your hair.  There are generally 25 teeth on this particular type of shear. If you have especially thick hair to cut, these are great.  However, they can be difficult to use and leave holes in the cut, so only use them for very thick hair. They can take big chunks out at once (40-80%), and can cut through thicker hair than a standard pair of shears.  These even work best with curly hair, which is hard to cut with normal scissors.  These shears have about 7-15 teeth on them. They remove much less hair than the other two pairs of shears.  This is a great pair of shears to go back over your hair after you have already made a pass with the standard shears.  They give your hair a softer, lived in look.  However, you will have to make more passes with these shears, as they take so little off. Most, if not all shears, are stainless steel.  However, shears with an adjustable screw can make all the difference in the world.  If you find that the tension is off, then the screw allows you to adjust it.
What is a summary of what this article is about?
Buy a pair of blending and texturizing shears. Add chunking shears to your array of scissors. Get a pair of finishing shears. Find shears with adjustable screws.