A flexible device intended to be inserted through an endoscope to ligate, cauterize, and cut polyps, or other mucosal lesions in the gastrointestinal (GI) tract, using high frequency current. It typically consists of a flexible insulated insertion sheath, a snare loop attached to the distal end of the sheath, and an operating wire connected to both the loop and a handle which controls the operating wire. The proximal end of the operating wire is connected to a high frequency power supply unit. This is a reusable device.