There are 7 different types of staplers:
The first one is a desktop – which can pierce up to 50 pages. They are usually compact and easy to hold, even in a one hand. Depending on the model, some new features can be added, such as the ability to tack a project to a vertical surface.
Electric  staplers can handle busy paperworks, and they can pierce large amounts of pages simultaneously.
Heavy duty staplers are also designed for a large amount of paper, but they don’t perform as quickly as electric ones.
Plier staplers are staplers that resemble pliers. They are designed for high load and thicker materials.
Long reach staplers produce stitches on booklets.
Specialty hand staplers resemble the desktop staplers, but these can deal with larger amount of pages, or can even be stapleless.
Reduced effort staplers are tools with construction allowing for piercing a bunch of pages without much effort.