Just welds and washers

 

Washer weld

 

Shaped surfaces of stainless steel washers create patterns of patterns within patterns.   

 

This closeup is from the sculpture "Untitled (Big B and the Looking Glass)" - a.k.a. "The Bunny" - by artist and designer Peter Diepenbrock.  Here, he used stainless steel washers to create a very large bunny rabbit. 

 

"The Bunny" can be seen in action here:  https://www.instagram.com/peterdiepenbrock/reel/C872-rpPZhE/