Strength and Durability 1. Fully wrapped heavy-gauge steel case protects against door edge attacks 2. All-metal zinc dichromate-plated working parts 3. Inside lock case protects electronic components 4. Two-piece anti-friction tongue reduces wear and tear 5. Outside and inside trim thru-bolted together and through the door Security Built In 6. Break-away spindle prevents unsecured failures and provides easy spindle replacement 7. Hub blocking plate protects lock against spindle manipulation 8. Spring-loaded fusible link provides fail secure mode in case of fire 9. Inside lever applied by screwless shank mounting ??? no exposed trim mount screws Adaptable To Your Application 10. Universal lock case ??? ten functions in one case 11. Floating mounting tabs automatically adjust to fit a beveled door edge 12. Field-reversible handing without opening lock case 13. External spring cages allow for simple trim retrofit 14. Locking thumbturn on the inside of door visua