Nike's Hammer watch is part of its "Mettle" series, whose main focus is durability and product longevity. It has the characteristic Mettle styling of a flat, square face and digital block letters, as well as pre-curved polyurethane strap. The watch is water resistant up to 100 metres, and has a scratch-resistant mineral glass crystal face cover and a stainless steel front bezel. Its features, including dual interval training mode, as well as chronograph, mean that it is also useful as a workout aid. This model has stylized cross-cut steel buttons.