New, open-box set of rack brackets, for securing equipment to 2-post racks (or just 2 posts of a 4-post rack.) Listing is per lot of 2 brackets, as shown -- a pair, left and right.
They're simple -- just bent pieces of metal with a few holes in them -- but they're robust, thick, and do the job admirably. 80-pound servers are nothing to entrust to the lowest buyer. (I have no idea what the manufacturer rates them for, but my guess is that the limiting factor is the screw shear strength, followed by the inadvisability of balancing a pile of servers on a relatively narrow support.)
Box is in rough shape, as pictured, but the brackets look fine.