The Vier V5EP6040CTSCE V5 Euro Cylinder is a high-quality lock designed for ultimate security. With a 60/40mm size, it fits most doors perfectly. The cylinder is made of durable materials and coated with a sleek satin chrome finish for improved aesthetics. The turn key feature adds convenience, allowing easy locking and unlocking. Keyed to Differ means each lock has a unique key, making it more secure.