The Gomco circumcision clamp is a metal device that medical practitioners use to perform circumcision, or the removal of the foreskin of the penis. Created in 1934 by Hiram S. Yellen, a physician who studied obstetrics and gynecology, and inventor Aaron A. Goldstein, the Gomco clamp was one of the first and, as of 2025, is the most commonly used circumcision clamp in the United States. To use the Gomco clamp, the medical practitioner first separates the foreskin from the glans, or head, of the penis, then places the foreskin into the clamp. The practitioner tightens the clamp, which crushes a thin, circular ribbon of foreskin, and then cuts off the remaining foreskin above the crushed portion. The Gomco clamp reduces the risk of blood loss, controls the amount of foreskin removed, protects the glans of the penis during circumcision, and allows for a clean surgical cut. By simplifying the surgical procedure of circumcision and reducing the risk of complications, the Gomco clamp helped to institutionalize routine, non-therapeutic infantile circumcision as part of the childbirth process in US hospitals.