A fastener arrangement comprises: a) a fastener receiver (12) having a lip (13); b) a fastener element (14) having a body part (15) and a resiliently connected latch member (16) having a hook (17) adapted to engage the lip; c) the body part comprising a fulcrum (18) adapted to bear against the receiver at a position spaced from the lip when the hook engages the lip, with relative flexure of the body part and the latch member giving rise to a force holding the hook under the lip and the fulcrum against the receiver; d) the body part having a press-to-engage, press-to-release actuator member (19) connected to the body part on the side of the fulcrum remote from the latch member; f) the hook having a camming face which, when the engaged fastener element is tipped about the fulcrum by pressure on the actuator member, cooperates with the lip to flex the latch member away from the lip to release the latch member so that the fastener element can be withdrawn from the receiver. A no-release version is also disclosed.