This 2-prong double adjustable universal clamp features an integral boss head with non-slip vinyl-coated rubber jaws. The clamp has an adjustable 7.5-8 inch length and accommodates objects up to 3 inches in diameter. Adjustable thumbscrews on both sides provide a wide range of fitting flexibility. Overall dimensions are 8 inches long, 4 inches wide, with a 1-inch boss head opening. Ideal for use with straight-sided glassware including tubes, flask necks, and burettes in laboratory experiments.