What happens is this: saw cuts are made in one end of the blank for the L-leg and thin pieces of wood are dipped in glue and forced into the gaps in the resultant. Then the wood is bent to a 90 degree angle using heat and steam. The finished leg is screwed to the underside of the seat. This method superseded complicated joints which called for a high degree of work by hand. This invention meant a major leap forward towards genuine series production of furniture, which is exactly what Aalto was aiming for in the early 1930s.

Thanks to the ingenious design, the three-legged stools could be stacked into towers – a clever way of saving space where necessary. The stools were used as additional seating in the lecture hall at Vyborg (Viipuri) Library (Alvar Aalto 1933-35).