Yes, called cauterisers. They come in 'high' and 'Lo' heat. The disposable ones can still be re-used if you cut off the top and replace the batteries then tape back shut.. The hot ones are very good for burning holes in spun deer hair flies like mice, to create a bed for eyes. The low heat ones are perfect for trimming a single errant piece of material or fuzz without causing potential damage to nearby material on the fly. Even though the 'low' heat ones fillaments don't 'glow', don't touch them as they are hot indeed.