There are many tools for working glass.
To make the right choices you need to know exactly what type of machining, such as objects and their sizes.
A tool wrong can affect the performance of a piece.
These are the essential tools: the jack, the tweezer, the straight shears, the diamond shears, pipes and props.
Of course, some of them may have different characteristics.
An example: the blades of the bag changing size and shape.
Might be okay for the sculpture, and instead make a good teacher in trouble for blowing.
Certainly can not make a cup or a pot of medium size with the same bag.
So you should think carefully before choosing.
You should also know that tools are very personal and that the more you use them and the more you will find here at home because the care and the "respect" that you must have in maintenance are important for the functionality and durability of the gears themselves.