3-Finger Clamp

Hold test tubes, flasks, and condensers steady on any support stand

This Three-Prong Universal Clamp attaches to any support rod up to 1.9 cm (0.75 in) in diameter and grips glassware with three coated fingers instead of the usual two-jaw pinch. Students turn the screw fitting on the rod mount to lock the clamp in place, then turn the second screw to open or close the three-finger jaw around a test tube, flask, or condenser tube.

The plastic-coated jaws grip glass firmly without direct metal-on-glass contact, so glassware doesn't slip during heating, titration, or distillation setups. The two screw fittings work independently, so students can reposition the clamp on the rod without loosening their grip on the glassware, or adjust jaw tension without disturbing rod position.

Why Teachers Love It

• Three-Point Contact Grip – The three-finger jaw holds round glassware more securely than a standard two-jaw clamp, so test tubes, flasks, and condensers stay put during a run.

• Independent Screw Adjustments – One screw locks the clamp to the support rod, the other opens and closes the jaw, so students can reposition without losing their grip on the glassware.

• Rubber-Coated Jaws – The coating keeps glass from slipping or cracking against bare metal, protecting both the glassware and whatever's inside it.