A device for securing a portion of a sheet of flexible material includes a first clamping element having a proximal end mounted to a first substantially vertical surface, a distal end, a first clamping surface orthogonal to the first substantially vertical surface, and a first opposite surface opposite to the first clamping surface. The device includes a second clamping element having a second clamping surface fitted against the first clamping surface and a second opposite surface opposite to the clamping surface. The device includes a securing element that, when engaged, forces the second clamping surface to exert pressure against the first clamping surface. In an embodiment, a portion of a sheet of flexible material placed between the first clamping surface and the second clamping surface prior to securing the securing element is held there by the pressure exerted against the first clamping surface by the second clamping surface.
