AMZCNC 15 Ton 1/2 Inch to 4 Inch Hydraulic Punch Driver Kit Manual Hole Knockout Puncher Tool w/ 10 Dies (15T(1/2"~4"))

I have used this for a bunch of knockouts in steel enclosures and it works well. My only complaint is the instructions are not great, and I managed to mess up the assembly a few times. If it feels like it is harder to pump than it should be double check you set it up correctly.

works great and as expected. also, came with extra seals for the hose. That was nice.

Worked well. Had to punch wiring holes into steel studs, some .1” thick. Uni-bits are pore choice. Machined an adapter for the 2” punch to use the 7/16 pull stud. That is all that is need to punch 26-gauge steel. I needed ≈900 holes in my steel eve soffit for vents. Just hand Punch a .5” hole for the stud than the knockout punch, No drilling required. The hose could be a little longer.

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This must be metric, because the 2" hole is actually 60mm, or 2-3/8". So the biggest hole is not 2". It messed me up a little because I cut the hole thinking it was exactly 2", before measuring it.

Se uso 3 veces, se hicieron 3 agujeros y reventó por una de las mangas hidráulica para que esto suceda se debería de usar muchísimas veces

Product seems generally fine, but o-rings or assembly was poor, and started losing pressure and leaking hydraulic fluid on the second use. No way to contact company, and outside of 30-day return window. Essentially a waste of ~$200

This was great while it lasted, but it blew a seal after a few uses.