A tool for manipulating a solid object (12) in a cavity (16) of a human or animal body, comprising a longitudinal rod member (14) adapted for insertion into said body cavity (16), a first coupling member (26) connected to one of the rod member (14) and the object (12) through a flexible filament (28), and a second coupling member (24) connected to the other of the rod member and the object, said first and second coupling members being arranged for being mechanically coupled together through magnetic attraction, wherein one of the first and second coupling members forms a recess (30), the other of the first and second coupling members is configured as a key member (26), and magnetic poles of at least one of the first and second coupling members are arranged for drawing the key member into the recess along a direction perpendicular to the longitudinal direction of the rod member, wherein the key member and recess are constituted such that when the key member is drawn into the recess, an operative contact surface exists between the key member and the recess, the said contact surface extending in a direction perpendicular to the longitudinal direction of the rod member.Linvention porte sur un outil de manipulation dun objet solide (12), dans une cavité (16) dun corps humain ou animal, qui comporte un élément tige longitudinal (14) conçu pour être inséré dans ladite cavité corporelle (16), un premier élément de couplage (26) relié soit à lélément tige (14), soit à lobjet (12) par un filament souple (28), et un second élément de couplage (24) relié à lautre élément parmi lélément tige et lobjet, lesdits premier et second éléments de couplage étant conçus pour être couplés mécaniquement lun à lautre par attraction magnétique, un des premier et second éléments de couplage formant un renfoncement (30), lautre des premier et second éléments de couplage étant configuré comme un élément clé (26), et les pôles magnétiques dau moins un des premier et second éléments de couplage é
