In bending and shaping the wire 65, the legs 65 f and 65 g of the finger 65 e may be offset out of a common plane as depicted in FIG. 8 so that when an object such as a writing instrument is inserted between the finger 65 e and the receptacle 35 b, the finger 65 e will be displaced upwardly, thereby exerting a locking bias to firmly retain the writing instrument in the receptacle 35 b.