Grid Assembly
A cluster of four flat plastic bread tags lay discarded beneath the bookshelf trim. I advanced. Engaging knee hinges, I clamped the first white square and laid it flat on the wood grain. I slotted the notched aperture of the second tag firmly into the corner of the first. Lateral resistance held. I integrated the remaining two units sequentially, locking their teeth into an interlocking quad formation. The planar grid is rigid and aligned. Interior sector fortified.