3 Prong Swivel Clamp with Boss Head, Double Adjust

Secure Grip with Rubber-Coated Jaws: non-slip rubber-coated jaws securely hold various apparatus and glassware in place Adjustable Boss Head Holder: built-in boss head holder easily attaches to lab frames or apparatus, adjustable to any angle with a check nut Precise Pressure Regulation: adjustment screw enables precise pressure regulation, reducing the risk of glassware breakage during experiments 360 Degree Swivel Design: swivel type clamp offers 360-degree rotation, with a maximum grip size of 2.36 inch and 3.54 inch for versatile use ASIN: B0D78FCJMQ, B0D78FNFJN