A substrate-mountable holder system comprising: a first portion, a cover, an anchor and at least one fastener, the first portion having a hook extending therefrom and at least one opening for receiving the fastener(s), a cover configured to engage the first portion and hide the fastener(s). The first portion may include a lobe proximate the top of the rear surface and a pad spaced from the lobe, the opening between the lobe and pad, for controlling deformation of the first portion. The first and second portions also may have a plurality of releasably engaging detents to lock the second portion in place, and the bottom of the second portion may angle rearward so as to bear against the substrate when the second portion is installed. Moreover, the first portion may include a barb on the lobe and/or one or more tangs extending from a recess in the rear surface of the first portion to embed in the substrate and inhibit rotation of the holder system.