This does not affect your right to an exchange or refund for faulty equipment.
The Petzl Stop is an assisted-braking descender designed for caving. It is used with 8.5 to 11 mm diameter low stretch kernmantel ropes. It improves descent control and facilitates rope maneuvers. The ergonomic handle makes for particularly comfortable grip and usability. Friction zones are stainless steel, to ensure great durability.