ALL jewelry clasps with any type of spring mechanism do in fact use STEEL springs.
It is the only material that is strong enough and can retain its memory.

Therefore they will be slightly magnetic.

14k Spring Ring Clasp (with OPEN Jump ring)

Stamped 585 for 58.5% gold, The International standard hallmark for 14k.

RHODIUM PLATED
That is a very thin layer of the most valuable precious metal over solid 14k gold.
This has a brilliant shine like chrome or freshly polished sterling, vs a yellowish white gold.
Almost every high end or designer white gold item is rhodium plated.

    5mm  +Jump Ring
    • Outside Diameter: 5.0mm +Jump Ring & Trigger
    • Inside diameter: 3.0mm
    • Ring gauge: 18gauge
    • Jump Ring OD: 2.60mm
    • Jump Ring ID: 1.40mm
    • Jump Ring ga:  22gauge

      • Weight:0.048 DWT or 0.075 grams

    Closed ring 154461408177, 4.5mm, 6mm, 7mm & 8mm also listed