| 11. | The raw material for the leaf springs, spring steel flats used to be imported into the country.
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| 12. | Some of them use 55Si7 spring steel.
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| 13. | I have a collection of old pry bars, including a long, thin handmade bar of spring steel.
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| 14. | Each antenna is made of approx . 0.2 mm thick and 5 mm wide spring steel measurement tape.
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| 15. | First generation Model 39 slides used either a long, spring steel extractor or a spring-loaded, pivoting claw extractor.
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| 16. | They are made from spring steel.
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| 17. | Both knives have clip point blades made of SAE 1095 spring steel with a hardness of 55 phosphate-treated.
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| 18. | Rubber discs, as well as spring steel, around the legs allow for compression and shock absorption on landing.
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| 19. | The dimensions of the spring steel clip determines thickness of the panel to which the nut may be clipped.
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| 20. | Typically made of wood, rattan, cane, wicker, spring steel or coiled wire, antique rug beaters have become very collectible.
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