A fastening device is provided for securing of liners to the interior of pickup truck cargo beds. The fastening devices include a base plate which overlies the outer surface of a bed liner and a locking tongue projecting laterally from a bottom of the plate to extend through an aperture in the liner...http://www.google.ca/patents/US5046775?utm_source=gb-gplus-sharePatent US5046775 - Snap-lock fastener for truck bed liners
