This versatile clamp features two separate sets of adjustable jaws for securing two burettes or any type of cylindrical tubes simultaneously. The PVC-coated jaws can swivel 90 degrees so they can be next to each other or separated. The jaws are rounded to provide a better grip on round tubes, and can be swiveled and locked at any angle. Plated brass nuts enable easy positioning of the clamps. The all-stainless steel jaws open from 15mm to 45mm (½” to 1¾”). The die-cast aluminum bosshead attaches to rods up to 13mm (½”) O.D.