ALLY Tools Super Strong 6 Inch and 5 Inch Heavy Duty Automatic Center Punch, Perfect Automatic Center Punch for Metal, Wood, Plastic, Glass, and Marble – Features Spring Loaded Center Punch Design

These look and feel a little rough, but theyll do the job. Out of curiosity, I took apart an old Starrett punch and found the springs to be interchangeable with the smaller punch in this set - so if youve got a similar old center punch with tired springs, this will rejuvenate it, and you get an extra larger punch to boot. Nothing wrong with these as they are though, especially for the price paid. I havent used them on an actual project yet, but they hit hard for sure, I expect them to work great for centering drill bits in metal. I havent tried breaking glass, but cranked down all the way I bet they would.

They need some adjustment

My older punch broke after only 40+ years. Eben if these only last a fraction of the time, they are a great buy

worked just fine

These look and feel a little rough, but theyll do the job. Out of curiosity, I took apart an old Starrett punch and found the springs to be interchangeable with the smaller punch in this set - so if youve got a similar old center punch with tired springs, this will rejuvenate it, and you get an extra larger punch to boot. Nothing wrong with these as they are though, especially for the price paid. I havent used them on an actual project yet, but they hit hard for sure, I expect them to work great for centering drill bits in metal. I havent tried breaking glass, but cranked down all the way I bet they would.

The punches work OK if you are careful. The action is not smooth, even after oiling. They produce an approximate center mark, not exact. I expected more for the price.

just what i needed

I took the two out the package and went to test them immediately. With wood them both worked great. Then metal… the small one was ok…. Felt alittle flimsy but worked with 10 punches in three types of metal. The bigger one only punched 4 times then stayed depressed in the down position and never came back up. Broke on the 4th metal punch. Finally bought a different one and it’s punched over 40 times and is still going. I may have gotten a bad one but two for the price of one in this case isn’t worth it. Get a different one, I can’t in good conscience recommend this item.

Does what it says, pretty good quality as well

My first product was defective and I tried to remedy it by oiling it. It does improve but still not well enough. I contacted the seller and the seller was friendly and helpful. Once found that my product is defective, seller send replacement very quickly. New product arrived perfect from Amazon warehouse. It works out of the box and I really like the adjustable tension.