Electrosurgical pencil is also called Cautery Pencils, Diathermy Pencils, ESU Pencils, reusable electrosurgical pencil. Use with Electrosurgical Generator(Unit), Radiofrequency Generator(Unit), and other High Frequency Equipments. It's a Monopolar hand-held active electrode Intended to produce certain physical effects required in radiofrequency (R.F.) and High Frequency electrosurgery.