Abstract: A spacer for alternately spacing apart and collapsing a first member and a second member which are pivotable about a pivot point. The spacer includes a planar sleeve for accommodating a portion of the first member and a ramped protrusion connected to, or integrally formed with, the sleeve portion for retaining the second member in a spaced apart position relative to the first member. The spacer is formed with an opening for accommodating a fastener for pivotably fastening ends of the first member and second member together.

Abstract: The tether cord is secured to the ball by a stud having an enlarged head engaging the external surface of the ball, and a shank passing through an opening in the ball and formed with a shoulder engaging the inner surface of the ball. The underface of the enlarged head is formed with a cavity for receiving one end of the tether cord, and with a bore extending from the cavity to the outer surface of the enlarged head through which the tether cord passes. The cavity is eccentric with respect to the enlarged head, and the outer end of the bore is centric with respect to the enlarged head.