Per our supplier that describes these better than we can.

"These Rigid Loops are 5.75 x 0.75 inch IWB (inside-the-waistband) loops made from Tegris® thermoplastic composite sheet, a high-performance material designed for heavy-duty, demanding applications. Unlike standard soft loops, these rigid loops provide a firmer and more structured attachment, offering excellent durability while securely holding your knife or gun holster in place on your waistband.

Designed to fit firmly against your belt and waistband, these loops provide a stable, reliable carry. Whether you need a more rigid option for everyday carry or require a rugged, heavy-duty solution."

SOLD AS A PAIR  colors vary