Grippers in Vial (IMAGE) Johns Hopkins University Caption This photo shows dozens of dust-sized surgical grippers in a vial. Credit Evin Gultepe, Gracias Lab, Johns Hopkins University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.