A retort clamp with four prongs is a laboratory tool used to hold glassware, such as flasks and test tubes, in place over a heat source. The clamp consists of a base, a screw mechanism, and four metal prongs that are used to grip the glassware. The base can be attached to a ring stand or tripod, while the screw mechanism allows the user to adjust the tightness of the grip.

The four prongs provide a stable and secure hold on the glassware, helping to prevent accidents or spills during heating or other laboratory processes. The retort clamp with four prongs is a versatile tool that can be used in a wide range of applications, including chemistry, biology, and other sciences.

It is known for its stability, reliability, and ease of use. The four prongs may be more effective for larger or heavier glassware, as the increased number of prongs provides greater stability and support.