Direct replacement for standard RV entry door locks. Fits 2.75 x 3.75 cutout. Features Bauers SCI technology to prevent tampering with lock cylinders. Low-profile inside egress prevents interference with screen door. Corrosion resistant lock cylinders based on ASTM B117-09 1000-hour Salt Fog Test. LighTaiwaneight, UV-resistant, with double-sided key. Uniquie key jacket to distinguish from other keys. Key logo on paddle indicates when paddle is locked and aligned with lock cylinder key slot.