noun
A tool for punching holes in paper, leather, or other materials. 穴開け器 is the general term; パンチ is also common in everyday use.
書類を綴じる前に穴開け器で穴を開けてください。
Please punch holes in the documents with a hole punch before binding them.
この穴開け器は厚い紙にも使えます。
This hole punch can be used even on thick paper.
Common loanword for a hole punch, often used in office contexts. 穴開け器 is the native Japanese term and may sound slightly more formal or descriptive.
Compound of 穴 (hole) + 開け (opening, from 開ける) + 器 (tool, device). Literally 'hole-opening tool'.