Dual-Level Security: This door knob with lock features a keyed knob on the exterior and a thumb-turn mechanism on the interior, providing reliable dual-level security. Ideal for both interior and exterior doors, it enhances the safety of your home or office Versatile Compatibility: Designed to fit most doors, this black door knobs interior includes an adjustable latch that supports 2-3/8" (60mm) or 2-3/4" (70mm) backsets. It works with door thicknesses ranging from 1-3/8" (35mm) to 2" (50mm), making it compatible with nearly all standard doors Stylish and Durable Construction: Crafted from premium stainless steel with a matte black electroplated finish, this bedroom door knobs with lock resists rust and wear for long-lasting performance. With ANSI Grade 3 certification, it combines durability with modern elegance, perfect for interior or exterior doors Quick and Hassle-Free Installation: Install your door knobs with lock and key effortlessly using just a screwdri