A flexible, manual instrument designed to trap/retrieve biliary and/or urinary stones (gallbladder and/or renal/ureteric calculi) from the body during an open surgical and/or endoscopic/laparoscopic procedure [e.g., choledochoscopy, endoscopic retrograde cholangiopancreatography (ERCP)]; it is not intended to fragment/crush. It is typically designed with a long, thin, flexible shank that has an expandable basket of wire (typically metallic) at its distal end in which the stones are caught. This is a reusable device.