Abstract: A cufflink clasp mechanism in which a medallion has a perpendicular tubular shaft at the end of which is a bar pivotally mounted by a pin passing through the shaft and an upright member attached to said bar; said upright member having a spherical enlarged portion approximately the size of the internal diameter of the tubular shaft and having a flat side parallel to and remote from said bar and flat side substantially perpendicular to said bar to which the flat side of a block is urged by a spring to bias the bar to stay in a position either parallel to the shaft or perpendicular to the shaft as it is set.