During the development of the Westerschelde Tunnel, the quality department identified two requirements that a spacer had to satisfy: speed and stability. At the time, our spacers didn’t meet these characteristics for tunnel construction. They had a spherical head and a surface with wire, but these variations were not stable enough for a round mould. Since the tunnel contains round elements, this was a problem. The spacer would shoot out when the mould was closed and the concrete was poured. After extensive tests and brainstorming sessions, we developed a new product: the MoClip Trio, a spacer with three feet. This spacer turned out to have perfect stability in a round mould, so we supplied a huge quantity of Trio spacers. The Westerschelde Tunnel was therefore a successful project in more ways than one: the MoClip Trio has been frequently and successfully used ever since.