Security and Reliability ANSI/BHMA Grade 3 certified for proven performance and durability. Tested to withstand over 200,000 operational cycles, ensuring longlasting function. Crafted from metal materials with a stability spring for enhanced strength and corrosion resistance. Designed to provide dependable security for your door, giving you peace of mind. Easy Installation Knobstyle design allows for simple operation and quick setup. Installation requires minimal tools and fits most standard doors. Standard Door Compatibility Adjustable solid metal latch fits backsets of 23/8 inches to 23/4 inches (6070 mm). Suitable for doors with thickness from 13/8 inches to 13/4 inches (3545 mm). Fully reversible for use on both lefthand and righthand doors. Versatile Applications Ideal for securing entrance doors, front doors, bedrooms, bathrooms, and interior doors requiring privacy. for residential homes, rental properties, or offices where reliable locking is essential. Practical for doors that require both security and ease of access. This keyed entry door knob offers the durability of heavyduty materials with the flexibility to fit a wide range of standard doors, making it a reliable choice for everyday security needs.