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

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

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

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