I use this clamp all the time with the ring stand to support different physics experiments. Because of its shape it can be used in many different configurations. Very helpful.
Bulky but Adequate
I'm using these clamps to hold my RC aircraft in order to drill into them for carbon fiber rod placement. The clamps are considerably bulky. They protrude around the bars hindering the attachment of the aircraft. The design could be a bit slender to accommodate the fuselage or empennage. The turn key is difficult to turn also. It slips occasionally.
A great tool!
This is a great tool for any science class. We did a lab collecting the period of different pendula and the clamp was exactly what we needed to make the set up much easier. It's about 4 inches long and the largest post size it would fit is about 1/2 to 3/4 of an inch but can fit even very small posts and keeps them held tightly.