1. Yale nightlatch (Ref: M)
2. Lock Springs (Ref: LS)
3. Letterbox Springs (Ref: LBS)
4. JR9 Era Viscount 5 Coil Closed Spring (Ref: ERAVIS)
5. Stanley 803 Hand Drill Springs (Ref: STA803)
6. JR4 Yale Nightlatch Spring (Ref: JR4)