When you first start to punch needle, it may seem a bit unbelievable. While you punch yarn through fabric without tying knots, why the stitches don't pull out?

The key is the tension! Each time youuse a punch needle to push yarn into the cloth, it pushes down a long end of the yarn. When you bring your needle back up, the end is folded into a loop. There are no knots used. As you continue to punch, the loops get tightly packed together, the tension firmly holds the stitches in place. It feels like a little bit of magic, right?