These are aftermarket omega replacement springs for the Benchmade 940 series of knives along with the mini griptillian, bugout, mini bugout, small crooked river, and 707.
The larger size Omega Springs are suitable for Benchmade Axis Lock 810 550 551 552 710 730. And the smaller size Omega Springs are suitable for Benchmade Axis Lock 940 535 555 556 557 707 533.
The Omega Springs are great aftermarket replacements accessories for your failure Omega Springs on Axis Lock
These were made from 304 stainless steel and heat treated appropriately.