AMZCNC Manual Knockout Punch Kit, Heavy Duty Metal Sheet Knock Out Box Hole Cutter Conduit Punch Driver Die Set ((Conduit Hole Size) 1/2"~1-1/4" Knockout Punch kit)

Cut several holes into metallic electrical boxes and sheet metal with this kit. Works great and great value for the money.

Despite some critical reviews, this knockout punch worked perfectly for my needs. I needed to add an external RV plug in my garage, and it handled standard electrical boxes flawlessly. The punching ability of this tool is excellent—it cuts through the material cleanly and effortlessly every time. The holes were cut precisely, making the job quick and easy. I’m not planning on using it commercially, so for the price, it’s an absolute steal. Considering the limited amount of punching I’ll be doing, this tool will easily last a lifetime. Highly satisfied with its performance!

These knockout punches were perfect for cutting a hole in my stainless steel kitchen sink for a filtration system faucet! I had to do it in two steps, a smaller die to cut the hole for the bolt for the larger final size die. Everything worked great!

Works as good as a Green-Lee set; Now I'll see if it works for 10 years. You can't beat the price.

Be careful not to over torque. The threads failed on the second use and I lost one of the dies. It literally will not come apart. Had to buy a replacement die and bolt. Do not use an impact wrench because the materials used can only tolerate limited force.

Very good quality

These worked perfectly. The only thing that would make them nicer is if the dies had flat surfaces so open end wrenches could be used to open them back up after punching the hole. As it is, we had to use locking pliers to do it. These are made of dies that are so hard that we actually wore out once set of locking pliers by wearing the teeth down, so I had to buy more pliers! I feel that flat surfaces to make the dies fit open end wrenches would have avoided that problem.

I needed a smooth hole bored into a large metal cabinet to run a power cord, this did the job quickly and efficiently.