Design Furniture Aldo Bakker’s TONUS Stool By David Fischer posted on April 15, 2011 6:30 pm No. 01 / 04 Browse Gallery Dutch designer Aldo Bakker shared the TONUS stool at Salone del Mobile in Milan. The stool is carved from a single piece of oak by craftsman Rutger Graas. Loving the line. More looks after the jump.