PRODUCT: These IRONTITE Victorian door knobs are to be used in conjunction with a sash rim lock (Not Included), making these internal door knobs simple to use and lockable. USES: These IRONTITE brass door knobs suit a variety of uses including commercial and residential doors, garage doors, shed doors, and gates etc. Used along with a brass rim lock to finish the look and make lockable. FITTING: These IRONTITE door knobs brass and surface mounted with only a hole needed drilling for the spindle, brass screws included making this door knob set simple to fit with basic DIY skills. FINISH: These IRONTITE round door handles internal / external are solid steel with a quality brass coating making them resistant to wear or damage from the elements. The brass finish gives a timeless look to your door. SECURITY: Use these IRONTITE brass door knobs for interior doors or exterior doors to help secure your property. Help keep pets and children safe with securely shut doors. When used with a rim lock Help protect your property from unwanted visitors by locking the doors.