A method for manufacturing a steerable instrument for endoscopic and/or invasive type applications, the instrument comprising an elongated tubular body having a proximal end part, a distal end part and an intermediate part between proximal and distal end parts, the proximal end part having at least one actuation proximal zone, and the distal end part has at least one flexible distal zone. The elongated tubular body comprises an inner cylindrical element, an outer cylindrical element and at least one intermediate cylindrical element having longitudinal elements and provided between the inner and outer cylindrical elements. Inner, outer and intermediate cylindrical elements are configured such that displacement of at least one longitudinal element in a longitudinal direction of the longitudinal elements as controlled from said at least one actuation proximal zone moves a corresponding flexible distal zone. At least one longitudinal element is attached to a fracture element by at least one bridge part providing a fracture location, the fracture element being provided in a gap between two longitudinal elements, the bridge part being arranged to restrict movement of the longitudinal element in a radial direction of the intermediate cylindrical element.
