2 Prong Swivel Clamp with Boss Head, Single Adjust

Secure Grip: non-slip rubber coated jaws securely hold various apparatus and glassware, including test tubes and flasks Versatile Attachment: equipped with a built-in boss head holder for easy attachment to lab frames or other apparatus, adjustable to any angle for convenience Precise Pressure Regulation: single adjustment screws facilitate precise pressure regulation, reducing the risk of glassware breakage during experiments 360-Degree Swivel Design: features a 360-degree swivel type clamp, allowing for flexible positioning, with a maximum grip size of 1.38 inch and 1.54 inch ASIN: B0D5H9RND5, B0D5HB194R