INTERIOR KNOB: Stylish and elegant, the Callan by Delaney HardwareCarlyle Passage Door Knob has no locking mechanism; both the exterior and interior door knobs are always free making it perfect for anywhere a lock isn't needed VERSATILE KNOB: These door knobs are compatible with doors measuring 1-3/8 inch to 1-3/4 inch thick EASY TO INSTALL: Perfect for DIYers & professionals alike, this interior door knob is quick & easy to install; installation requires only a Philip’s head screwdriver, & the door knob comes with easy to follow instructions & necessary hardware STYLISH & DURABLE: This knob offers elegant style to complement a wide assortment of decor themes; the knob’s bronze finish coordinates perfectly with other bronze accessories in your home WHERE STYLE MEETS SECURITY: Located in Georgia, Delaney combines superior products with great value to bring a touch of Southern Hospitality to every room in your home; we’re here for every step of your journey with expert customer service