Patent ID: 8152549

Claim:
An article of manufacture comprising: a plurality of regularly spaced connecting elements projecting from a surface of said article, wherein each connecting element of said plurality of connecting elements comprises: a first stub projecting substantially orthogonally from said surface and comprising at least one wall and a cap section; and at least one first stalk projecting substantially orthogonally from said surface, said at least one first stalk being separated from said at least one wall defining a first gap therebetween; wherein said at least one first stalk comprises: a stem projecting substantially orthogonally, at a proximal end thereof, from said surface; a lip section extending from a distal end of said stem, said lip section protruding outwardly relative to said stem; and an engagement section extending from said lip section, wherein a free end of said engagement section defines a distal end of said at least one first stalk, and wherein an outer surface of said engagement section defines a first gradient.