Size
2.5/3/ 3.5 /4 /4.5 / 5 /5.5 /6 /7 /8 /9/ 10mm
product name
hole punching machine
Application
paper, book, Tag, Account books, Handbags, etc
Drilling diameter
2.5/3/ 3.5 /4 /4.5 / 5 /5.5 /6 /7 /8 /9/ 10mm
Drilling depth
40 --50mm ,(can choose more longer driller blade)