What piece of lab equipment should be used when transferring a test tube from the rack into a beaker of hot water?

What piece of lab equipment should be used when transferring a test tube from the rack into a beaker of hot water?            

The answer is a test tube clamp.          

These clamps are used for holding test tubes firmly in place when the tubes are hot.                                                        

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]