Durable and Secure ANSI Grade 3 Entry Door Knob Set Built to Last: Tested to exceed 200,000 operation cycles for longterm reliability. Enhanced Security: Features a 5pin pickresistant brass cylinder with nickelplated brass key for smooth, dependable operation. Wear and Corrosion Resistant: Quality materials ensure resistance to wear and protect against rust and corrosion. Modern and Comfortable Design Attractive Black Finish: Modern antifingerprint coating maintains a clean look while enhancing durability. Safe, Rounded Ball Handle: Smooth edges prevent hand strain or injury during use. Rust Surface: Designed to withstand exposure and maintain appearance over time. Secure Keyed Entry Function Key and Lock Mechanism: Designed for exterior doors where safety and controlled access are essential. Universal Key for Combo Packs: All locks in the set operate with the same key for convenience. Reinforced Lock Latch: Strong latch resists impact and remains functional even when the door is slammed. Versatile Fit for Standard Doors Adjustable Latch Backset: Fits both 23/8 inch and 23/4 inch backsets for flexible installation. Compatible Door Thickness: Fits doors 13/8 inch to 13/4 inch (35mm to 45mm). Standard Installation: Designed to fit all standard door preparation sizes. Practical Applications 1. Residential Front or Back Doors: Reliable keyed entry for everyday home security. 2. Office or Commercial Spaces: Ideal for exterior office doors requiring controlled access. 3. Rental Properties: Samekey convenience helps simplify property management and tenant access control without sacrificing security.