A **test tube holder** is a simple laboratory tool used to safely hold, carry, or heat test tubes during experiments. It prevents direct contact with hands, protecting users from heat, chemicals, or breakage. ### Key Features of a Test Tube Holder: * **Material**: Commonly made of wood, metal, or plastic. * **Design**: A spring-loaded clamp or tong-like shape that grips the test tube securely. * **Size**: Suitable for standard laboratory test tubes (10 mm – 25 mm diameter). * **Function**: Allows safe heating of test tubes over a flame or moving them without direct touch. ### Uses: * Holding test tubes while heating substances over a Bunsen burner. * Transferring hot or chemically reactive test tubes. * Preventing accidents caused by breakage or spillage.
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