Lishi M4/MS4R-AG Original Tool

The Lishi M4/MS4R-AG Original Tool is a precision-engineered 2-in-1 tool designed for non-destructive opening and decoding of locks using the M4 and MS4R key profiles. These profiles are commonly found in padlocks, cabinets, and technical installations and are used in Master Lock systems within the North American market.

The tool combines proven Lishi mechanics with a clearly readable scale, allowing accurate identification of individual pin positions. The structured layout simplifies assessment of different depths and pin combinations and enables precise interpretation of tactile feedback during operation. This allows controlled work without additional aids.

The Anti-Glare (AG) finish reduces distracting reflections and improves readability of the depth markings, particularly under strong lighting. Manufactured from durable stainless steel, the tool remains stable and reliable even with frequent professional use.

The M4 and MS4R profiles are commonly used in compact locking systems where durability and space efficiency are required. For professional users working regularly with these lock types, the Lishi M4/MS4R-AG Original Tool is a practical addition for structured and traceable work directly at the lock.

Tool for professional users.