Abstract: In this rotary fastener which can be used particularly on ski boots two traction wire tensioning elements can be altered in their effective length in opposing directions by a rotary movement in one or the other direction in order to tighten or loosen shoe closure flaps. For the accurate adjustment of the rotary fastener and accurate adaptation of the shoe to a foot a ratchet arrangement is provided in the region between the rotary knob and the wire reel for the traction wire tensioning elements and contains an intermediate element which supports a pawl and is rotatable with the rotary knob whilst maintaining a free play as well as a gear ring inserted in a housing cover and is thereby of simple and compact construction.