Both Watson and Crick utilized the molecular models, ring stands and clamps that were a predominant part of the chemistry lab. Among them the vertically oriented pentagons are the sugar of deoxyribonucleic acid (DNA), which forms the backbone of the DNA, which is found behind Watson and the other to the left of Crick. The nitrogenous bases were held horizontally by means of clamps.
The items used in the model of Watson and Crick that includes the ring stands and clamps were seen in a chemistry lab, which they used to demonstrate the structure of deoxyribonucleic acid (DNA) in a simple manner.