AMZCNC 3" Conduit Punch and Die for Hydraulic Knock Out Driver 3/4"-16UN Thread ((Conduit Hole Size) 3")

Came on time and as described great price as well

I have a hydraulic hole punch set that went up to 2” diameter. Being able to purchase additional larger sizes at an affordable price was a big plus.

Was like 35 times cheaper than greenlee or Milwaukee. Only made 4 holes with it but seems to be great especially for cost

Great fast

Does the job.

Good shipping good 3" Conduit Punch

This die has trouble punching a hole in aluminum

I've purchased a few of these low cost knockout punches to use for various projects. They do o.k. for the one or two time user but if you're purchasing it to use it daily as a production tool, you'd better buy Greenlee. The clearance between the cutter head and the cup is too large and allows sheet metal to displace between the two pieces causing it to jam. It also occasionally doesn't cut cleanly, and you have to open it up, re-orient the cutter head to cut the areas that didn't completely cut thru.

Threads on die are useless, all galled and missing in some places. Material is hardened so only solution was using tiny wheel on die grinder to recut threads.