Check the listing for details. (4) Thrust Reverse Deactivation Pin From Boeing, Learjet, Airbus. Condition: New. Listed at 19.95 USD. Not exactly sure what these are, but I think I labeled it correctly. If anyone knows, let me know and I will change the title. These came from an estate of an aviation airline mechanic. Fairly certain these are thrust reverse lockout pins for some commercial jet.