3-Finger Cork Lined Extension Clamp with Swivel Bosshead – 3.4" Max Opening, Zinc Alloy Lab Clamp for Flasks, Beakers & Test Tubes

Upgrade your laboratory setup with this 3-Finger Cork Lined Extension Clamp with Swivel Bosshead, designed for secure and precise support of glassware and lab apparatus. Built from high-grade zinc alloy with a durable, non-toxic powder coating, this clamp delivers long-lasting, rust-free performance in both professional and educational environments.

The 3.4" (8.5 cm) maximum opening accommodates beakers, Erlenmeyer flasks, test tubes, boiling flasks, burettes, and more. The cork-lined jaws provide a cushioned, slip-resistant grip that minimizes the risk of breakage while keeping delicate glassware firmly in place.

Attached to a swivel bosshead that fits support rods up to 18mm in diameter, this extension clamp allows for flexible positioning and secure attachment. The screw adjustment mechanism offers precise control of grip pressure, making it ideal for repetitive use in laboratories, science classrooms, and even home experiments.

Whether you’re setting up a chemistry experiment, biology demonstration, or a home science project, this industrial/research-grade clamp ensures stability, safety, and reliability.