What is the gadget called that you use to sew something? It is not a sewing machine, but more like a hole punch with thread attached. I think it was created to repair tents.
Answers: Tool Used to Repair Tents
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You're thinking of a sewing awl.
It's called an awl, and there are a couple of different types that I know of. If you are using one to repair a tent, make sure that you have some type of waterseal to apply to the repair. I would search for 'awl' online, to see where is the cheapest place to buy one. I used to see them in a catalog that we got in the mail, but can't find it, and don't recall the name of the company. Best of luck to you!
It is called a awl and used to repair anything made of fabric/leather.