Door Hardware

Cosmas door knobs, door levers, handlesets, and deadbolts provide coordinated hardware for interior and exterior residential doors. Choose the design, finish, and operating function appropriate for each door in the home.

This collection includes round door knobs, traditional and contemporary door levers, front-door handlesets, and residential deadbolts in Oil Rubbed Bronze and Satin Nickel. Matching products can be used throughout the home for a consistent appearance.

Choose the correct door-hardware function

• Entry or keyed: locks with a key from the exterior and is commonly used on exterior doors, garages, and other secured entrances.
• Privacy or bed-and-bath: locks from the inside without a keyed exterior cylinder and is commonly used for bedrooms and bathrooms.
• Passage or hall-and-closet: operates the latch but does not lock, making it suitable for hallways, closets, and other rooms that do not require privacy.
• Dummy or inactive: a non-turning trim piece commonly used on closet doors, French doors, and other doors that do not require an operating latch.
• Front-door handlesets: combine exterior entry trim with an interior knob or lever selected from a coordinating Cosmas series.
• Deadbolts: provide a separate locking bolt and are available in participating single-cylinder and double-cylinder designs.

Door knobs and lever styles

The Cosmas 20 Series features a traditional round door-knob design. The 30, 50, and 80 Series provide different door-lever profiles, allowing you to select a shape that works with the architecture and furnishings in the home.

Door levers can be easier to operate because they do not require the same gripping and twisting motion as a round knob. Handing requirements vary, particularly for non-operating dummy levers, so review the selected product specifications before ordering.

Oil Rubbed Bronze and Satin Nickel

• Oil Rubbed Bronze: a deep, warm finish suited to traditional, rustic, and transitional rooms.
• Satin Nickel: a softly brushed silver finish that works well with contemporary and transitional interiors.

Finish appearance can vary with lighting, surrounding colors, and screen settings. Select products from the same Cosmas finish and series when close coordination is important.

Checking door compatibility

Many Cosmas residential knobs, levers, handlesets, and deadbolts fit doors from 1-3/8 inches through 1-3/4 inches thick and include an adjustable latch for 2-3/8-inch or 2-3/4-inch backsets. Compatibility varies by product, so confirm the door thickness, backset, bore-hole preparation, and handing requirements on the individual product page.

Mounting hardware and matching strike plates are included with participating products. Cosmas residential locksets are sold individually, allowing each door to be assigned the appropriate function.

Complete the installation with coordinating Cosmas Door Hinges in compatible sizes, corner styles, and finishes.

Frequently Asked Questions

What is the difference between entry, privacy, passage, and dummy door hardware?

Entry hardware has a keyed exterior lock. Privacy hardware locks from the inside for bedrooms and bathrooms. Passage hardware operates without a lock. Dummy hardware is non-operating and does not control a latch.

Should I choose a door knob or a door lever?

Both operate a door latch. Knobs provide a familiar round design, while levers use a push-down motion that can be easier to operate. The choice depends on the desired appearance, accessibility needs, and compatibility with the existing door preparation.

Are Cosmas door levers reversible?

Many operating Cosmas door levers are reversible for left- or right-hand doors. Some dummy levers require a specific left-hand or right-hand version. Check the handing information in the individual product description.

How do I determine whether a door is left-handed or right-handed?

Stand on the side of the door where you can see the hinge pins. If the hinges are on the left, it is a left-hand door; if they are on the right, it is a right-hand door. Handing is particularly important when ordering handed dummy levers or other nonreversible products.

What is door-hardware backset?

Backset is the distance from the edge of the door to the center of the main bore hole. Common residential backsets are 2-3/8 inches and 2-3/4 inches. Many Cosmas products include an adjustable latch compatible with both.

What door thickness will Cosmas hardware fit?

Many Cosmas residential locksets fit doors from 1-3/8 inches to 1-3/4 inches thick. Verify the thickness range on the individual product page, particularly when installing hardware on an unusually thin or thick door.

Can multiple entry locks be keyed alike?

Participating keyed products offer keyed-alike and keyed-differently selections. Keyed alike means the eligible locks in the order are prepared to operate with the same key. Review the keying selector on each product before adding it to the cart.

What is the difference between single-cylinder and double-cylinder deadbolts?

A single-cylinder deadbolt uses a key outside and a thumb turn inside. A double-cylinder deadbolt requires a key on both sides. Double-cylinder locks can affect emergency egress and may be restricted by local codes, so confirm local requirements before installation.

Is mounting hardware included?

Cosmas residential door hardware includes the required mounting components described on the product page. Participating knobs, levers, and deadbolts include a latch, mounting hardware, and a matching strike plate.

Are door knobs and cabinet knobs interchangeable?

No. Door knobs operate a latch mechanism installed through a full-size door. Cabinet knobs are small decorative pulls attached with a mounting screw. Browse the separate Cosmas Cabinet Hardware collection for cabinet doors and drawers.

Browse all available functions, series, and finishes in the complete Cosmas Door Hardware collection.