Mechanical Combination Locks S&Gs mechanical combination locks uses three combination wheels and are tested against expert manipulation for 20 man-hours. The combination locks uses standard footprint to match the mounting dimensions of most mechanical and electronic safe locks. For further information please contact customer support. 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!