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

Made a small prick in both aluminum and hard steel. Although I thought it worked fine I believe a slightly stronger spring would improve it. I used it full tension but would liked slightly more resistance for a little deeper hole.

karmiero 2 Pc Automatic Center Punch Remarkably, both of the spring-loaded automatic punches worked the first time. The grip is easy to maintain. First, I tried various types of wood. The pressure to activate the punch is minimal. Each time it scribed a hole mark. I then went to metals such as aluminum and steel. The steel required spring adjustment to get a good visible hole. The punch never slipped and was accurate. The tools are easy to assemble and disassemble. Well manufactured, and no detectable flaws. Excellent value.

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.

Nice punches. Took one to work with me for making rivet holes in the plastic. It works great.

It malfunctioned on 3rd use, not sure how long it will last.

IF yours doesnt punch holes, you have to open up the front part and change the direction of the spring. The spring that is closest to the hole punch part. For some reason the spring I received way put it backwards so it was catching on the mechanism inside and not pressing into the whole fully.

Buen marcador

This is a nice punch. Would have given 5 stars, but the first time I used it, the punch did not reload. I took the unit apart but found nothing I could see holding the spring. I banged it on the table and the spring released. After reassembling the punch worked perfectly and reset every-time.

These seem well-built and sturdy, although the mechanism is a little stiff (maybe after I use it for a while, it will become smoother). I used it to make a few drill guides in a wood beam, and it worked just fine. One small negative is that if you dont know how to adjust the tension, these came with no instructions whatsoever. Fortunately its not hard to find this info online (or figure it out): the farther you unscrew the base (the end farthest away from the point) the less tension there is on the mechanism and the less force needed.

Our punches worked as intended. We had no problems. The springs were resistant and did not catch. Will hopefully last a long time.