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How to Use
Step 1
Install the correct punch mandrel on the hydraulic cylinder along with the female portion of the punch die.
Step 2
Drill a pilot hole large enough to clear your selected punch mandrel.
Step 3
Insert the punch mandrel through your drilled hole in the panel. Install the male portion of the punch die by threading it down to the point where it is snug against the metal to be punched.
Step 4
Close pump valve and pump the handle until the punch is drawn through the metal. Release the pump valve and remove the punch dies.
Thank You
On behalf of our team here in Fremont, California: thank you to all the customers who have allowed us into your homes, shops, garages, and places of work.
TEMCo Industrial has been a leader in power and industrial equipment and tools since 1968. We’re proud to offer quality tools at affordable prices backed by our knowledgeable support. We believe that any DIYer or professional who works with their hands is doing honorable work and so we do our best to respect the trade or craft.
John L.
2025-08-28 11:01:46
Before I purchased this product, I read all the reviews, and reached out to TEMCo directly, with my concerns, before making my purchase.TEMCo was quick to respond and address any concerns I had; i.e. draw stud construction, case sturdiness, seal leaks... There were no excuses given. Just assurances the issues had been corrected.Satisfied with their responses, I purchased this set. What I received exceeded my expectations. I have used Greenlee knockouts in the past, and this unit is right on par, with quality. The case is designed well and very sturdy. The hydraulic unit, hose and ram are very sturdy. The draw studs and cutters are substantial as well.I have used the 3.5" knockout on 14ga galvanized steel. After 8 holes, the knockout is producing holes as clean as the first one.This is a High Quality tool, at a Great Price!!
Desiree
2025-08-25 10:59:16
If you are working in the marine field and dealing with a lot of NEMA 4X and NEMA 12 enclosures...this thing is the best money you will spend all year. It has greatly increased the productivity and proffesional appearance of the holes in these enclosures. SO MUCH BETTER than a hole saw, and way more economical than a battery powered set. It is very fast, the plug buster has broken every single plug thus far, making material removal super easy. The only down side to this unit is the weight of the power head... if you have to work overhead, you better eat your Wheaties cause this thing will wear you out if you have 14 holes to poke. Other than that, I love this tool.
Kimberly Engebretson
2025-06-18 12:32:37
First of all, I’d like to say I absolutely love a knockout set. We use it weekly on a professional basis and I’m going to buy two more. It works better than our name brand KO punches and all of the dyes and thread are universal with name brand manufacturers. The latches on the case broke due to improper loading in our truck reached out to the company immediately got back to us and sent us replacements. They’re awesome.
Glenn
2025-05-06 15:37:37
Tool itself seems ok, however on my first hole (4â€) the draw bar broke. First it bent then broke on the second hole... no big deal they have a 5 year warranty right. Apparently not. I contacted the company without even a reply. Warranty is a lie. After only a month they forgot about me, a customer with the ability to write a review. Bad move. Tool is now useless.Update: after some back and forth with Temco i received a replacement draw stud. Only after i sent them a picture of the hole i punched when it broke, described the metal i was punching out and also explained my experience using these types off tools. I also had to contact amazon directly since i wasn't getting a response from them. In the end they stood behind their product, seems like they were more concerned about my review then my satisfaction with the tool. the draw bar was delivered extremely quickly and the tool is back in working order. I do believe that it might have been a defective part that broke in the first place, the tool seems to be a well made quality tool. My original review was one star but since they made things right i give it 4 starts for good quality at a great value. I would purchase more of their products for sure.
J. Ruggieri
2025-05-02 09:11:46
Purchased in anticipation of needing to punch out many various conduit penetrations in the field to thick, mild-steel weather-rated enclosures - ranging from 4-inches to 1/2-inch. While we have Greenlee manual sets, the thought of wrestling with, holding and torquing out many close-spaced holes was concerning. The hard part was measuring and marking. The Temco unit quickly provided that welcome 1st click, 2nd click, 3rd click and 4th click feedback indicating progress and release and with just a few effortless pumps. Good buy and the product seems well made and the packaging decent.
Colin Duffy
2025-04-09 11:58:31
I had a job where I had 7 stainless steel cabinets that I had to cut 3" and 2" holes in each one. It was in a casino that was open for business so using a hole saw would be very loud and messy. I decided to buy this knockout set so that I only had to drill a small hole to get the 1/2" post through. On my very first attempt I "guessed" at the location to start my first hole. Once I used the 1/2" ko to make a hole that the 3" could use I set it up with out looking at "exactly" where I was cutting. Half way through I realized that at the bottom of the cabinet there was a lip that caused it to be two layers of s.s. causing my KO to lock up, couldn't get it through and couldn't get it to release. My 3" was destroyed. Thank God I had a 3 1/2" in the kit and did the rest of the job.I contacted TEMCo and explained what I did wrong and asked if I could just buy the parts I ruined. I had amazing customer service and they ended up sending me a replacement 3" KO!!! What an awesome company to warranty a product that I ruined because of lack of preparation. My kit is whole again and I use this where ever I can, best purchase of the year!!!
jane a. hatfield
2025-03-30 13:10:56
Product arrived as described and pictured. This is a very heavy tool kit and the plastic storage/carrying case was damaged in shipment. I contacted customer service and they sent a new case FedEx plus two components that I inadvertently damaged on first use. This is a great company and good tool kit, don't hesitate to purchase.
Gunny
2025-03-15 09:42:46
This unit/set works exactly as advertised. I used the unit the entire afternoon this past weekend & it worked perfectly. It beats using a manual knockout set which i have. Granted; i am using this unit/set for personal use at home & not commercially. I have NO complaints at all. I still have more to do& look forward to taking my time & letting the unit/set do ALL the hard work.Outstanding price & value, extremely pleased & happy with my purchase.
Shawnboy
2025-03-07 17:04:18
A game changer when you are punching 15/20 2 1/2" holes per day.Only beef is that it is very heavy to cart around. Glad I have an apprentice.
Ryan Zrinski
2025-02-03 16:19:29
Absolutely worth the moneyMake sure to use the proper spacers.We wrecked a puller and a 3" by not following the directions and the company replaced for free. This is a company that needs more attention. Great group of people.
Narinder Bhoday
2025-01-26 14:50:56
Very good quality product, but the shaft broke in second use.
Gurdeep
2025-01-03 10:59:24
I bought this product and used to punch my first 3 inch hole and the draw started bending.i bought myself another draw and tried to punch 2 inch hole this time,it still got stuck I stopped pumping it when i saw its stuck to save the draw.Apparently the knockout punching dies are not made of good quality.the punching die always hit the outed hole die on a spot and then draw starts bending.So really disappointed with this product.
John b.
2024-12-01 14:52:17
The head is much too big and will not be any use to me in the small areas I need it to fur
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