Foundation stone puja is performed for the long-term use of any building or physical structure and for the prevention of architectural defects. The foundation stone is the act of placing the foundation store or performing the rituals. This puja material, which is prepared to ensure that there is no error in the puja material for such an important task. 

Read More about the Puja set can be found here here: 

Gurumanjari Silyanyaas Puja Set