1 / 4   It’s hard to believe that this stunning art piece is made entirely from screws. /Photo from Boredpanda

2 / 4   The work, “Descent” by American artist Bruce Mackley, has caught people’s attention online. It took Mackley hundreds of hours and 20,000 screws to accomplish, according to media outlet Boredpanda. /Photo from Boredpanda

3 / 4   With the screws pinned at different depths, the portrait has a three-dimensional appearance. /Photo from Boredpanda

4 / 4   It may be difficult to transport for exhibition, however. This art work has a weight of about 350lb and a height of seven feet. /Photo from Boredpanda