Firmly grasps glass distillation columns of varying sizes and odd-shaped glassware Constructed of stainless steel with strong, chromed-brass band and chain Offers a 152mm (5.98") long extension arm The flat thumbscrew/worm-drive design permits maximum tightening and quick removal

Stainless steel worm-drive screw clamps have large, flat thumbscrews for fast and easy adjustment. Four sizes to accommodate 64 to 165 mm diameter apparatus.