Abstract: A setting (1), including, aligned along an axis for driving into a bed (8) of a piece of jewellery or timepiece (9), an upper body (15) including a first surface (2) to receive a component to be set (10), a setting element (4) to hold the component (10), and a lower body (16) including a second front surface (6), between which bodies (15; 16) a deformable area (7) is plastically deformable under the action of an axial driving force greater than a predetermined driving force, to bring the setting (1) into a stressed state wherein the deformable area (7) is irreversibly deformed and/or fractured, in the form of a clot radially pushing back a peripheral surface (3) of the setting (1) towards a lateral wall of the bed (8), or/and in the form of a fault radially pushing back the upper body (15) towards this lateral wall.

Abstract: A clasp for a wristlet, the clasp including at least one set of four arms hinged with respect to each other so that the clasp can pass from a first position, referred to as the deployed position, wherein the arms are oriented radially towards the outside of the wristlet, to a second position, referred to as the closed position, wherein the arms are folded against each other so as to be placed under the wristlet, this set of four hinged arms including two sets of compasses formed by two arms joined by a hinge, the free end of the arms being mounted pivotally, on a first and on a second part of the wristlet.

Abstract: A clasp for a wristlet, the clasp including at least one set of four arms hinged with respect to each other so that the clasp can pass from a first position, referred to as the deployed position, wherein the arms are oriented radially towards the outside of the wristlet, to a second position, referred to as the closed position, wherein the arms are folded against each other so as to be placed under the wristlet, this set of four hinged arms including two sets of compasses formed by two arms joined by a hinge, the free end of the arms being mounted pivotally, on a first and on a second part of the wristlet.