A retort clamp is a lab tool used to hold and secure glassware, such as a retort or a flask, in place during experiments. This particular retort clamp is made of aluminum and is rotatable, allowing for easy adjustment of the angle of the glassware.

It also has a rubber grip to ensure a firm hold without damaging the glassware. The clamp has an extension arm that can be used to hold other lab equipment, such as a thermometer or burette.