的带扣（1），包括折叠的第一（2）和第二臂（3）铰接约托架（4），所述第一支脚（2）铰接到第一磁轭（5），并且所述第二支腿（3 ）到第二蹬（6）。 所述第一马rup（5）属于第一单件式帽（7），其第一分支（7）的下表面（71）在其任何角位置与第一分支（2）的一端（23） （72）的厚度腕带条带小于或等于给定的厚度（EP），并且所述第二磁轭（6）构成的第二帽（8）可移动的下部，并且包括至少一个附接装置 （61）布置成与所述第二帽（8）的可移除上部（82）的互补紧固装置（81）一起夹紧在手镯束的孔周围，以调节 所述手镯链的有用长度。

A buckle (1) comprising folding a first (2) and a second arms (3) articulated about a cradle (4), said first leg (2) being articulated to a first yoke (5) and said second leg (3 ) to a second bracket (6). Said first yoke (5) belongs to a first one-piece cap (7) having a bottom surface (71) defines with an end (23) of said first leg (2) in any angular position thereof, a passage space (72) to a thickness of wristband strand less than or equal to a given thickness (EP), and said second yoke (6) constitutes the lower part of a second cap (8) detachable and comprises at least one fastening means (61) arranged to cooperate in clamping around an orifice of a wristband strand, with complementary fixing means (81) of a removable upper part (82) of said second cap (8) for adjusting the useful length of said wristband strand.