Single Cylinder Deadbolt: The deadbolt can be opened and locked with a key from the outside and a rotary knob from the inside, making it suitable for both interior and exterior doors. Same Keys for All Locks: When purchasing multiple sets, all locks are keyed alike, allowing one key to operate all locks for convenience. Application: This combination of door levers and deadbolts enhances the appearance of residential or rental properties and complements contemporary, , transitional, traditional, Victorian, and colonial style decor. Adjustable Steel Latch: The door lever fits doors with a thickness ranging from 35mm to 60mm and features an adjustable backset of 60mm to 70mm for flexible installation. Quality Guaranteed: Certified to ANSI Grade 3 standards, the hardware set has undergone rigorous testing exceeding 200,000 operational cycles, ensuring durable performance.