Self-pierce rivets and an adjustable strap handle

A strap handle comprising:

• a strap groove which is configured to receive an upper head of a dual head self-pierce rivet, said strap groove providing an enlarged opening in communication with a slot area, wherein the strap groove is configured such that the upper head of the dual head self-pierce rivet is insertable in the enlarged opening, after which a ring groove of the dual head self-pierce rivet is slidable into the slot area, wherein the strap handle further comprises a strap guide which is configured to receive a strap.

A strap handle as recited in clam 9, wherein the strap guide includes two parallel openings for receiving the strap.

A strap handle as recited in clam 10, wherein the strap guide comprises a set of teeth proximate each opening.

A cube frame comprising:

• edge pieces;
• corner pieces attached to the edge pieces via dual head self-pierce rivets and single head self-pierce rivets, wherein the dual head self-pierce rivets are proximate corners of the cube frame, and the single head self-pierce rivets are located at other locations of the cube frame.