A new surgical tool is here proposed to be used together with a circular stapler to help performing a mechanical anastomosis of the low rectum after a sigma or rectum resection. Its name, grasping tie, indicates its main function to fix from outside the rectal stump to the axle of the stapler anvil by means of a nylon ribbon slipping knot before the connection of the two parts of the stapler. The small dimensions of the operative end of the tool make easy to operate in the narrow space of the deep pelvis.