Dual Safety The bedroom door knobs with lock, suitable for locking two sides of the door, with one side locked by a turn-button and the other by a key, making it the superior solution for building a secure environment. Door Compability Adjustable latches of entry door knobs fit 2-3/8'' (60mm) or 2-3/4'' (70mm) back sets, and the lock set fits 1-3/8" (35mm) to 1-3/4" (40mm) thickness doors, meeting your requirements. Premium Material Crafted from heavy-duty and rustproof stainless steel and boasting ANSI Grade 3 certification, this exterior door knob is built to last, being the ultimate choice for those who value durability. Modern Design Feature a perfect satin nickel finish, our locking door knob for bedroom provides a simple yet stylish touch to your home or commercial area. Easy to Install Easy to assemble with just a screwdriver, and the installation process is quick and user-friendly, saving you time and effort.