A three-prong clamp with an extension arm is a type of laboratory clamp used to secure flasks, test tubes, and other glassware in place during experiments. The three prongs provide a secure grip on the glassware, while the extension arm allows the clamp to be positioned at a greater distance from the base, providing more flexibility and versatility in positioning the glassware.

The three-prong clamp consists of three metal prongs that are mounted on a metal plate, creating a clamp. The prongs have rubber or plastic tips that grip the glassware, holding it securely in place. The extension arm allows the clamp to be positioned further away from the base, providing more freedom to position the glassware as needed.

Three-prong clamps with extension arms are commonly used in laboratory setups to hold flasks, test tubes, and other glassware in place during experiments. They are also used in workshops and DIY projects to secure pipes, tubes, and other items in place.

Overall, three-prong clamps with extension arms are a versatile and convenient tool for holding glassware and other items in place in laboratory and workshop settings. They are secure, adjustable, flexible, and provide a secure grip on the glassware, making them a popular choice for many applications.