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A fastening device comprising a curved clamping plate bent into shape from an elongated, resilient plate which has an elongated slot longitudinally disposed at one end, a square recess spaced from said elongated slot and a hole disposed at an opposite end for holding a key chain; and a substantially

A fastening device comprising a curved clamping plate bent into shape from an elongated, resilient plate which has an elongated slot longitudinally disposed at one end, a square recess spaced from said elongated slot and a hole disposed at an opposite end for holding a key chain; and a substantially Z-shaped strip spring having one end fixedly secured to said elongated slot at one end through welding joint before said elongated, resilient plate being bent into shape. The strip spring is squeezed to produce a spring force, when the curved clamping plate is clamped on an object, to rub said object against the square recess so as to firmly retain said object therebetween.

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A fastening device comprising a U-shaped clamping plate bent into shape from an elongated, resilient plate, and a substantially Z-shaped, elongated strip spring rectangular tab having a pair of members contained in parallel planes and a diagonally interconnecting spring plate connecting said tab mem

A fastening device comprising a U-shaped clamping plate bent into shape from an elongated, resilient plate, and a substantially Z-shaped, elongated strip spring rectangular tab having a pair of members contained in parallel planes and a diagonally interconnecting spring plate connecting said tab members at adjacent ends, said U-shaped plate having an elongated slot longitudinally disposed along one leg, a square recess in the internal surface of an opposite leg disposed across from said elongated slot and a hole disposed at an opposite end of said opposite leg for holding a key chain, said Z-shaped strip spring having one tab welded to said U-shaped plate at an internal surface of the leg having said slot at the end of said slot adjacent the end of said leg and the opposite tab being normally received in the recess in the opposite leg of said U-shaped plate and wherein said strip spring is squeezed to produce a spring force, when said U-shaped plate is clamped to receive an object, urging said object against said square recess so as to firmly retain said object between said curved clamping plate and said strip spring.