LichampManual Knockout Punch Kit, Heavy Duty Metal Sheet Knock Out Box Hole Cutter Conduit Punch Driver Die Set

Sometimes I don't understand what people are talking about when they review a product. If I listen to most reviews I wouldn't have bought anything from Amazon. I don't know what people are trying to cut with this or how they used it but I have no experience in doing this and it worked perfectly. Cut a 3/4 hole in a pretty thick metal box, without the tool being damaged and the hole is clean. I don't recommend using a power tool with this. And faster sometimes is not better. If you're looking for an inexpensive way to punch a hole through some metal boxes this will work great, read the directions. Someone on here said it messed up after they cut stainless steel. Well the directions say do not use on stainless steel. Also you need to oil not with WD-40 but with oil after each use. Make sure everything is straight snug and go slowly to cut and you won't have any issues. And one more thing the size was perfect.

I needed to punch a 1.25” hole into my breaker panel for a conduit attachment. It worked fine. Was sharp enough and had a bearing to take the thrust load of pulling the punch into the die. I only successfully used it once. Not sure if it is sturdy enough for commercial everyday use. It probably is.

I usually buy cheap products to find gems that work as good as the more expensive brands. This is not that, this broke the first time I used it, the metal is not sharp on the knockout side made not sturdy on the main threads, this worked on the 1/2” and 3/4” but not on the bigger sizes, it got stuck midway I think the threads failed, no way to undo it I had to throw it away

The holes made here are for the Outside Diameter (OD) for the "Trade Sizes" of US Electrical Conduit.For a US Conduit size of 1/2", the actual OD of the conduit is ~7/8" (0.875"). Similarly -US Conduit size of 3/4" is actually 1-3/32" (1.094") OD.US Conduit size of 1" is actually 1-11/32" (1.344") OD.US Conduit size of 1-1/4" is actually 1-11/16" (1.688") OD.The OD of the hole punches in this kit therefore are approximate to the actual (larger) Conduit size.I am adding a chart that provides the comparison to US Conduit OD sizes to both Greenlee Standard Knockout Punch Units (which is a well-known and reliable brand) and to these Lichamp punches.(Note that the Lichamp sizes are what I personally measured by hand with a micrometer and may not be as accurate were the measurements taken on better measurement machinery.) Note that a couple of the Lichamp Punch OD measurements are negative, but all measurements vary only slightly.In conclusion, for the low cost of this product, I found that it worked very well. This was for knockouts in electrical boxes. It is important that the material specifications into which the holes are made be followed. (I.e., "Mild Steel" and not stainless or heavier gauge.) If I were using such a tool on a frequent basis, I would consider a more expensive set, including hydraulic activation, but for occasional use, this product was satisfactory.

Muy útil para el trabajo

Work as it should like

I couldn't find hole saws the correct diameter for conduit so I tried these. Easy to use and I was successful on my first try. But I'll probably never need them again for the rest of my life.

This set doesn't work very well. Once the punch knocks a hole in the box, it's stuck...tight. Not easy to get it out. The knocked out piece can be difficult to get out of the tool as well. I'll be using a different product in the future.