Keys Category B (ASSA 704/709) Explanation Keys to the ASSA 704/709 Features / Function Key Lengths: 70mm 95mm 96-125mm 126mm - Keys Category A (ASSA 308) Keys to the ASSA 308 Keys Category F (ASSA 960) Keys to the ASSA 960 Keys Category C/D (ASSA 1919, 1920, 1924, 1925, etc.)Keys to the ASSA 1919, and others. Do you want to create a safe lock environment? ASSA OEM has created "The lock guide by ASSA OEM", and it's made to give you knowledge and tips about approved lock sets. We really encouring poeple to read our tips and guidelines here: The lock guide Want to download our product catalogues? If you prefer to download our product catalogue - you can download it here! We also provide instructions, declarations and other documents in our download documents section.Check it out!