This a simple model of a hammer. It's close to the size of some of the smaller claw hammers you can buy. It lacks the claw back and instead has a simple angled "claw" liked section. Making a simple print that still has an angled nail removal looking back-end. I tried using the hammer in the pictures as a metal hammer and it broke. I put it back together for the the pictures above. You can see that here https://www.youtube.com/watch?v=lGO6WYaORmE . That does not mean that this would not make a great toy for any child wanting a hammer. You can also see a time lapse print of a hammer, that was a failure. The model and print orientation is the same as the hammer model above. https://www.youtube.com/watch?v=PCStK__L9pM

Did a second test and actually managed to get a few nails hammered into some wood. You can see that here https://www.youtube.com/watch?v=FdjymGq9VJg