Table leg from Doug Mockett: http://www.mockett.com/furniture-hardware/

Love the appearance of a cantilevered magical "float" of the desks and files on the back wall. As they said, the legs are from Mockett. I've used them a fair amount in the past. Great industrial designers and wonderful catalog, lots of other types of creative products. I especially like their squiggle leg. I can't speak to this exact one but they do a good job of spelling out specs when selecting the right one pending weight and height. Some have plates on the top and the bottom. The bottom one, I will counter-sink into the subfloor or substrate and cover with final finish floor product. Then, because I've been lucky to have crawl space or unfinished basement below, I bolt upward into the plate from there. The terrific tall, sleek and monolithic wood columns on the ends give a great sculpted feel. When I want to keep that look but put them to work, I use a touch latch. Curious, are these void spaces?