Blowtorch

"Yes, that's my new toaster. It's some kind of handheld model, you see! Let me tell you, it burns very hot!"

- Winifred Whittle, referring to a blowtorch

A blowtorch is a fuel-burning tool used by Muggles for applying flame and heat to various applications, usually metalworking.

When Muggle construction workers threatened to disturb the habitat of magical beasts in a forest that had not been properly protected with Muggle-Repelling Charms, witch environmental activist Winifred Whittle spread around the woods a series of Muggle Guards to keep them at bay. While doing so, she retrieved what she called a "toaster" — but was actually a blowtorch.