Review on Leather Craft Tool Hole Punches 1+2+4+6 Prong Lacing Stitching Punch, Craft Kits - 4mm by Angela Rodriguez

I received this set of piercings and they were great! First. After several knife sheaths, I noticed that the pins, especially on the 4 and 6 irons, were starting to move and bend. They were easy to bend back. But once the steel starts to bend, it becomes easier to bend it over and over again. I remembered the description saying it was "carbon steel". This implies at least an average carbon, 0.4% -> 0.6%. Hardened steel. But that's not the case. I normalized the iron in my forge and then tried tempering it. I tried oil first. Not hardened. Then I tried to dive into the water. Not hardened. These are excellent irons at a low price. And they last quite a long time for a beginner even if they keep bending the pins open. But it's mild steel, not carbon.