Abstract: A mounting device for installing a track for a curtain or blind has an engagement portion for cooperation with the track by a snap-type engagement. A resiliently deformable release means has a tongue portion (29) that has a free end that is positioned in a cavity of the track when the engagement portions are fully mutually engaged and a connected end that is connected to the mounting portion and spaced from the free end and that is positioned externally of the cavity of the track when the engagement portions are fully mutually engaged. The tongue portion (29) has an abutment face (33) disposed for assisting with prising apart the mounting device and the track by turning a tool, simultaneous with the operation of the tool against the tongue portion. The abutment face is opposed to and spaced from the track in use.