About this item

• PREMIER QUALITY: KNOBWELL 4 inch black door hinges are made from high-qulity iron, with Matte Black finish. Our round black hinges are Thick and Heavy Duty, which can be used on interior or exterior doors without problem.
• EASY INSTALLATION: Every single door hinge includes detailed installation document in English, from the tools you need to the final check. All people, even without any experience, can install the black hinges quickly.
• PACK INCLUDES：4"x4" door hinges x 3 Pack, 8 long screws per hinge, Installation Document. The rounded door hinges can be used on left or right-handed doors, which is a perfect choice to combine with the matte black door levers in our store.
• SPECIFICATIONS: Size: 4 inch X 4 inch; Corners: 5/8 inch radius, solid and heavy duty, can easily replace most other door hinges. Our interior black door hinges are pre-lubricated, no worry about squeaking, suitable for bedroom, guestroom, office and any place where quietness is needed.
• WIDE APPLICATIONS: These round door hinges 4in could be mounted on interior doors like cabinet, wooden door, salon door, shutters, skylights, toy box, etc. heavy duty enough for exterior doors such as garage, playhouse, entryway, gate doors and more. We recommend use at least 2 hinges per door.
• LIFETIME WARRANTY: The black door hinges have passed 24 hours salt spray text and can be used for long-time. KNOBWELL offers 1-year trial and lifetime after-sale service. If you have any problem at anytime(including missing parts/installation question), please feel free to contact us and we will certainly offer you satisfactory method.

Privacy Function(With Lock)

• Key Features: No key required; can be locked from the inside and opened from the outside with a tool if necessary.
• Applicable Scenarios: Bedrooms, bathrooms, studies, and other rooms requiring internal locking.

Passage Function(Non-Locking)

• Key Features: Controls door opening and closing without a locking function or key.
• Applicable Scenarios: Hallways, closets and other areas where locking is unnecessary.

Dummy (Without Lock and Keys)

• Key Features: No key, no locking function, and no turning mechanism—designed purely for pushing and pulling.
• Applicable Scenarios: Pantry doors, decorative doors, and other doors that only require push/pull functionality.

Keyed Entry (Different Keys)

• Key Features: Each lock corresponds to a unique key, ensuring security and privacy. Lockable from both inside and outside.
• Applicable Scenarios: Front doors, main entrances, bedrooms, bathrooms, and other spaces requiring high privacy.

Keyed Entry (Same Key)

• Key Features: Allows multiple locks to be opened with the same key, simplifying management and enhancing convenience.
• Applicable Scenarios: Office buildings, shopping malls, hotels, apartments, schools, gyms, storage cabinets, etc.

Shipping

• Free shipping on all orders,no minimum price limited.
• Orders from the following countries, we will arrange shipments from local warehouse: United States,Canada,Australia,United Kingdom.
• Shipping time is approximately 2 working days form the process date via Fedex. Please note that public holidays, national holidays and peak seasonal shipping periods could produce longer delivery times.

Return & Warranty

• Please check the items and accessories once you receiving KNOBWELL package, and if there's any quality problem or item missing, please do contact us within 48 hours, and we will arrange refund or replacement as you need.
• 3 Months Warranty Refund
• 1 Year Warranty Free Replacement
• If you have any questions, please contact us through this email:service@knobwellstore.com, we have a professional customer service team will deal with it for you. 

DOOR LOCK

1.Are KNOBWELL door locks secure?

Yes. KNOBWELL provides door locks including single-bolt, double-bolt, privacy locks, channel locks and other types. They meet US household standards and are made of solid zinc alloy or stainless steel. Some models have anti-pry and anti-collision designs, which are safe and reliable.

2.Will the KNOBWELL lock fit my door?

Our door latches fit most standard US doors (1-3/8" to 1-3/4" thick). Fitting dimensions and installation instructions are listed on each product page. If you're unsure, contact customer support for help.

3.Are installation accessories and instructions included?

Yes. Each door lock set includes the required screws, installation template, instructions and accessories. No professional tools are required, and ordinary users can install it by themselves.

4..Can it be used for left and right opening doors?

Yes. Most of KNOBWELL door locks are designed to be reversible and suitable for left and right opening doors. The handle direction can be adjusted as needed during installation.

5.Do you provide Keyed Alike service?

Yes, KNOBWELL has “Keyed Alike” door locks. To learn more, type “Keyed Alike” in the search box or click here to view.

6.How to rekey?

Currently, most KNOBWELL mechanical locks do not support DIY rekeying. If you need to replace the key, it is recommended to contact a local locksmith.

7.Will the finish on a door lock age?

the brass finish is coated with a hard-wearing lacquer to protect the product. (please note, all finishes are prone to ageing.)

8.How is the quality of KNOBWELL door locks?

All KNOBWELL products must undergo rigorous laboratory testing before release, such as salt spray testing, impact testing, rain testing, etc. Only products that meet ANSI/BHMA certification will be released.

CABINET HARDWARE,HINGES

1.How to confirm the handle size?

You can choose based on the hole spacing (center to center distance, usually 3", 5", 6-1/4", etc.). If you need to replace the old handle, please measure the old hole spacing first to see if it matches

2.Will the handles/hinges rust?

The surface of KNOBWELL products is electroplated or sprayed, which has good anti-rust performance and is suitable for use in most climates. It is recommended to avoid direct exposure to extreme humidity or salt spray environments.

3.Does the hinge have a mute function?

Some of our hinges use ball bearing design, which is more durable and effectively reduces the noise of door opening and closing. Suitable for bedrooms, study rooms and other spaces that require silence.

ORDERS QUERIES

1.How long does it take for my order to be processed and shipped?

Estimated delivery times can be found on the checkout page based on your location.
shipping times vary by delivery address.for all stocked items, orders will be processed within 48 hours from the time the order was placed. orders placed on Saturday, Sunday or a holiday will be processed the following business day.You can click shipping policy to learn more.

2.How can I track my order?

the tracking link will be emailed to you as soon as your order has left our warehouse.

our virtual assistant can provide the status of your order. enter ‘order status’ and when prompted enter the order number and order email address. if the order has shipped you will also receive the tracking number.

3.Can I cancel my order?

The order can be cancelled before it is shipped, but it cannot be cancelled once it has started shipping.If you have any queries regarding your order, please do contact our customer service team via service@knobwellstore.com.

4.My order has arrived and is damaged- what do i do?

Firstly, we are sorry you have received a damaged item. Please contact our customer service team at service@knobwellstore.com. In order to determine the actual problem and resolve the situation effectively to your satisfaction, kindly provide the following information where applicable:

– Sales Order Number (if known)
– Full description of the product including finish
– Images of the faults including a short video of any non working parts
– Confirmation of where the product is installed
– Full details of the problem you are experiencing

5.How do i get the estimated delivery cost?

All products in KNOBWELL store are free shipping and tax-free.

6.How do I return an item?

You can find out how on the Return Policy page

our returns policy; which is in addition to your statutory rights, entitles you to a refund for products bought online or in store with a valid receipt or parcel summary document within 30 days of receipt. for a refund; items must be unused/unworn with all tags attached, returned in the original packaging and in a resaleable condition.