Buying options (Stock vs Part Only, etc.)

Part only is just the screen itself, which includes the glass, lcd etc.

Kits include tools such as pry tools, screw drivers etc.

A stock is slightly less quality than the regular screens you get. You probably wont notice the difference.

B stock is slightly less quality than the A stock. B stock come from a lower quality yield percentage per batch of screens.

I've used regular, A stock and B stock screens. I havent had issues with any.