This device is used for puncturing abdominal wall tissue during laparoscopic examinations and surgeries to establish a working channel for abdominal surgery. Depending on the packaging, it is available in single trocars and multi-unit trocar sets. Single trocars are also available in five sizes based on the inner diameter of the trocar sleeve: 3mm, 5mm, 12mm, and 15mm. The trocar consists of a puncture cone and a puncture sleeve. The puncture sleeve consists of a cannula, cannula seat, inflation valve, and locking cap. The puncture cone consists of a puncture rod and rod seat. The pneumoperitoneum needle consists of an inflation tube, puncture needle, valve body, and inflation valve. The specimen bag consists of a bag body and a pull-out rope. The multi-unit trocar set is a combination of the trocar, pneumoperitoneum needle, and specimen bag.