The Harloff MR Cart Breakaway Lock Kits (MR-3IN-BA / MR-6IN-BA / MR-21IN-BA / MR-31IN-BA) are non-magnetic, MRI-safe security assemblies engineered specifically for Harloff MRI-compatible mobile emergency carts. Designed for use in magnetic resonance imaging suites (tested for 3.0 Tesla environments), these kits provide single-motion breakaway activation to ensure instantaneous supply retrieval during emergency code situations within Zone IV magnetic fields. Available in 3-inch, 6-inch, 21-inch, and 31-inch (full-length) vertical locking bar configurations, each factory-installed kit utilizes non-ferrous materials that will not react to high-field strength magnetic attraction or interfere with imaging equipment. Upon activation, pulling the locking bar handle snaps the plastic breakaway seal, granting immediate access while leaving an undeniable visual indicator of cart entry for clinical staff.