The snare is usually used with an endoscope and high-frequency generator. It is applied to emove single or multiple polyps of the mucosal layer of the digestive tract. Polyps of different sizes can be taken out by electrocoagulation and cutting snares of different calibers, and the diameter is generally less than 2cm. Three loop designs of oval, crescent, and hexagonal are available for various types of polyps. And its twisted stainless steel wire prevents loop distortion.