
United Scientific® 3-Prong Clamp With Flexible Extension Rod by United Scientific pairs a 3-prong clamp head with a 12" nickel-plated flexible arm that holds its position at nearly any angle under loads up to 1 pound. The clamp opens to 3.75", and the boss head fits rods up to 0.88" (22 mm). Teaching and research labs use it to hold probes, thermometers, and small glassware.