completely intact vintage industrial adjustable height factory stool salvaged from a chicago gear and sprocket factory. features a bent tubular steel four-legged base comprised of heavy gauge steel. the heel ring or footrest is welded firmly to the legs. the centrally located threaded spindle moves upwards and downwards with ease. adjustable folded steel contoured backrest. original solid maple wood circular seat. likely fabricated by the adjusto equipment co., bowling green, oh. two similar stools available.