2Pcs Heavy Duty Automatic Center Punch, 5 Premium Steel Spring Loaded Center Hole Punch, Adjustable Spring Impact Center Marker Scriber Tool for Metel, Plastics, Wood, Glass by karmiero

This offer was for 2 identical punches at a low price. Very handy to have in 2 different locations. I dont know how long they will last, time and use will tell.

One didnt work at all and the other works kind of, but only 1 out of 2 times.

cheap, but junk. ordered first pair, one worked. ordered replacement pair on amazon, neither worked.

This is a usable and functional low budget center punch. The product listing indicates it’s made of “high-quality stainless steel” but it appears to be run of the mill steel. I saw no difference when I adjusted the spring tension and used the punch on 1/8” thick mild steel and the resulting dimple wasn’t very deep at any spring tension. That said, it’s usable and there’s admittedly little to complain about given the $6 price for 2 punches.

The mechanism in both United are very difficult to work. Need to repeatedly press the unit down more than once to have the spring disengage and spring back to make the mark. Is is easier to just use a scribe instead of the center points that I purchased. Not happy with the product unfortunately. Thank you.

It seems like a bit of a stretch (i.e. that the spring impact will punch an adequate drill spot or mark). But it does! I tried it on alloy carbon steel...and it left just the right sort of dimple for the hole to be drilled. Its hard to predict how long the punch will maintain its point (before re-sharpening needed). I made a little holder for this useful too, between the drill press and the bench vise. ~ The Duffian

Neither item work directly out of the box!

The karmiero is decent and definitely more than expected for the price of $4.99 especially since it comes with two. It has worked well for my use so far but probably not made for daily shop use. This spring loaded center hole punch design uses adjustable Spring Tension screw, you only need to rotate the cover to get the suitable impact strength to leave an indentation on your surface. So far Ive used on wood and metal with. no problem.

I really like these centering punches. Ive been working on a project that involves drilling dozens of holes in mild steel. My old punch (another automatic) never left a satisfying dimple to start a drill bit. It would leave a mark to line things us, but it wasnt deep enough to ensure that the bit wouldnt wonder. Well not these punches! The point on these punches is sharp and suepr hard. The spring has a terrific punch to it and is strong enough to get a good start in any metal or wood surface. My drill bits of various sizes were always right on center following the dimple from these punches. Highly recommended.

I dont think these are fully stainless steel, but thats somewhat expected at this price point. Both of my punches work as intended and require a pretty average amount of pressure to fully engage the punch. I havent tried messing with the spring intensity yet because there was no need, but you should be able to make it firmer or softer depending on your application. Just based on the price I doubt these will last a long time but worst case I have a couple backup/throw away punches as needed.