Features Firm for Fixing: Enables great stability in fixing and holding, this laboratory stand clamp holder will better facilitate your experiment. Right Angle Use: The 2 clamps on both ends are integrated in 90°, and the right angle design will perfect the fixing for easier operation. Wide in Utility: Through simple screwing, the bosshead clamp can be adjusted to clamp a variety of test tube, flask, glass tube and so on. Copper Material: Adopting premium copper material, the bosshead holder with 8cm total length is not easy to deform, and also very durable. Easy to Install: Comes with a compact size and a light weight as well, the laboratory clamp holder is very convenient to install in minutes. Specification: Item Type: Laboratory Clamp Holder Material: Copper Use: Fixture for fixing.  Package List:1 x Laboratory Clamp Holder Package List 1 x Laboratory Clamp Holder