The 42 millimetre case is made from ceramicised titanium. The material, which is treated using an electroplasma process, achieves a hardness of around 1000 Vickers (this is a hardness unit used in materials testing) and combines high scratch and impact resistance with low weight. The design is characterised by the open tubular frame construction, derived from racing car construction. It supports the movement, distributes mechanical loads and replaces classic horns with swivelling brackets with up to 45 degrees of movement.