The slide hammer is "built-in", interesting idea.
http://www.telwin.com/en/prodotti/?id=823219&lingua=E
I am not familiar with Telwin, and I don't know if they have a distribution presence in the US. However, they have an interesting product. The only kind of stud welder I've previously used is the standard hair dryer looking thing that welds a pin; then you put a separate slide hammer on the pin.
Is there anyone else who makes a combination device like this?
- WoodpeckerWelder
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Workhorse
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Joined:Sun Feb 12, 2017 1:08 am
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Location:N Georgia USA
I don't know about the distribution in the US, but that is a cool product! 
"Why is there never time to do anything right the first time but always time to do it again?"