These are the corner pieces that hold the iPad in place inside the frame of the iPad stand with the SKU IPDLMSSVL3 and GTIN 810878025681 (https://www.displays2go.com/P-22292/Adjustable-Tablet-Stand-for-Businesses?st=Class&sid=1097#product-qa). They are not available for re-purchase which means that one would need to buy another stand for $99 to have the stand in a functional state again if one loses even only one of the cornerpieces.