Abstract: A device includes a spool; a fish tape wound on the spool; a magnet coupled to the spool; a sensor configured to detect the magnet and to generate a signal indicative of the detection; and a controller in communication with the sensor and configured to determine an extension of the fish tape based on the signal; and output the determined amount.

Abstract: A blank for forming a plurality of containers includes a sheet of material having a plurality of edges and first and second pluralities of score lines. The first plurality of score lines, together with the edges, define a first plurality of panels. The blank is foldable along the first plurality of score lines to define a primary container. The second plurality of score lines are defined within at least one of the first plurality of panels. The at least one panel is detachable from the remainder of the blank, and is foldable along the second plurality of score lines to define a secondary container.