two-hole paper punch (also known as a hole puncher or paper puncher), which is an office tool used to create holes in sheets of paper so they can be filed in a binder or folder. 

Shopping information:

Two-hole punches are commonly available at office supply stores and online retailers. 

They come in various capacities, from light-duty punches for a few sheets to heavy-duty models that can handle 50 or more sheets at a time. 

Features often include an adjustable paper guide for accurate alignment, a non-slip handle for comfort, and an integrated, easy-to-empty waste compartment. 

Prices vary widely depending on the capacity, material (metal or plastic), and brand.