US Patent 9924765 Rail fastener

A fastening device includes a base including a top surface; a first fastening field extending from the top surface of the base and including a plurality of first fastening elements, each of the first fastening elements including a fastening feature, the fastening feature of at least some of the first fastening elements extending in a first direction; and a second fastening field extending from the top surface of the base and comprising a plurality of second fastening elements, each of the second fastening elements including a fastening feature, the fastening features of all of the second fastening elements extending in a second direction that is angled with respect to the first direction, the second fastening field divided from the first fastening field by a dividing line.