Door knobs are the everyday touchpoint that elevates both function and style across bedrooms, bathrooms, closets, and entry doors. The right knob improves security, privacy, and durability while complementing your hardware finish and interior design.

Common types cover most needs:
- Passage knobs: free-turning for hallways and closets.
- Privacy knobs: push-button or turn-lock for bedrooms and bathrooms, with emergency release.
- Keyed entry knobs: locking cylinders for front, back, and garage doors; pair with a deadbolt for stronger security.
- Dummy knobs: single-sided pulls for double doors or decorative applications.

Materials and finishes influence longevity and look. Solid brass and stainless steel offer strength and corrosion resistance; zinc alloys balance cost and performance. Popular finishes include satin nickel, polished chrome, oil-rubbed bronze, and matte black, while glass or ceramic knobs add vintage flair. For exterior use, choose weather-rated, rust-resistant hardware with UV-stable finishes, especially in coastal environments.

Check performance and fit before buying. ANSI/BHMA Grades indicate strength: Grade 3 for basic residential use, Grade 2 for higher durability, and Grade 1 for the most demanding applications. Confirm door prep: a 2-1/8 inch bore, 1 inch latch hole, adjustable backset (2-3/8 or 2-3/4 inches), and door thickness of 1-3/8 to 1-3/4 inches. Many rosettes are designed to cover old paint lines or oversized holes, simplifying upgrades.

Installation is typically DIY-friendly with a screwdriver:
- Measure backset and door thickness.
- Orient the latch bevel toward the strike.
- Tighten through-bolts evenly and test smooth operation.

For security and convenience, look for pick-resistant cylinders, rekeyable cores, keyed-alike sets, and privacy pins with emergency egress. Maintain knobs with a soft cloth, non-abrasive cleaner, and a dry lubricant on the latch. Whether you need interior door knobs, keyed entry knobs, or dummy knobs, choosing quality hardware ensures smooth operation, cohesive style, and long-term value.