It is split hole puncher. It is popular in electricity industry, construction, etc. It need to work with a pump. It could punch 3/8"(ф10.5mm), 1/2"(ф13.8mm), 5/8"(ф17.5mm), 3/4"(ф20.5mm). A good tool for you!
|Manufacturer Warranty||6 months|
|Model||L and H style|
|Number of Pieces||4|