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

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.

I used them to mark holes for screws on metal and they did not disappoint. Heavy duty and Precise.

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.

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

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

If you have to drill holes in ...... you can simply start drilling and hope the drill bit actually goes in straight. On metal or on rounded surface you know the drill bit will dance around before catching and scraping up the surface as it goes. These center punches are spring loaded so you simply place it where you want to drill press and it leaves an indent keeping your drill bit centered and straight. A must have for anyone working on metal or plastics. Good quality tool which when you learn how to use you wont ever not want to be without.

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

Ive never used spring loaded punches before, always simple pointed awls. These are great. They easily mark wood. I couldnt get them to mark mild steel, but I dont think that is what they are designed for. Im sure theyd do softer metal like aluminum as well as wood. For the price you get 2!

Doesnt work like it suppose to . Cheap made and no good to me !

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.