Iittala Flatware Dining and Entertaining Tools Piano Workshop 98 Dinner Knife - made of 18/10 Stainless Steel. An extension of the hand Renzo Piano is one of the world's leading architects. The soft and user-friendly cutlery service he has created for Iittala is the smallest thing he has ever designed. The cutlery series has a hollow handle in polished Stainless Steel. The new serving cutlery has wooden handles.