The Harloff Best Narc Lock, Keyed to D1569, provides high-security physical containment specifically engineered for controlled substance drawers, narcotics boxes, and high-value pharmaceutical compartments inside mobile medical carts. Featuring a precision Best interchangeable core cylinder, this heavy-duty mechanical lock is pre-keyed to key code D1569 to support standardized narcotic box security protocols and pharmacy key schedules. Constructed with solid brass internals and a reinforced lock body, it delivers dependable key-controlled access that prevents unauthorized tampering and supports strict regulatory compliance for controlled substances. Designed for seamless installation into Harloff internal narcotic drawers and security boxes, this replacement lock assembly ensures immediate, tamper-resistant protection across Canadian healthcare facilities, hospital wards, and surgical suites.