Last updated: August 18, 2021

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If you are looking to renovate a room, one of the things you should not overlook is not the paint, not the floor, but the entrance itself. You won't feel like you've done a total renovation if every time you go to open the door, you feel like you're entering the same old room.

It may not feel like it, but you don't need to change the entire door to feel the change. Buying the best doorknobs on the market will literally put the opportunity to feel like you're entering a new place in your hands. This guide will not only help you buy models to renovate, it will also help you repair damaged ones.

To make this knob buying guide, we at Reviewbox did an analysis of these products. We looked for the most sought-after features and paid attention to buyer reviews. We also looked at the factors to consider when buying them, as well as where to buy them and their prices.


  • Knobs are nothing more than simple handles used to open doors, gates and wardrobes. They operate using a twist-driven mechanism, which allows doors to be opened and closed. They can include different methods of locking, which can be classic keys, cards and even magnets.
  • These can be classified in many ways, from the mechanism used to open the door, the shape of the knob or the material used for its construction. The most common knobs are those made of metal and those made of wood, the former are easy to maintain and can be painted, and the latter are inexpensive.
  • If you are installing a new door, look at where the knob is installed to get a better idea of which one you should buy. If you are replacing an old one, you can make a note of its dimensions to buy one that will fit perfectly. Finally, think about the material and colours you would like it to be.

The Best Knob: Our Picks

Buying Guide

If you've never bought and installed a knob before, it's normal if you're a little intimidated by the idea of choosing one and fitting it yourself. To help you get a better understanding of these household tools and to ease your fears, in this section we'll explain everything you need to know. From what they are, what their types are and where to buy them.

A doorknob that matches the colour of your door will enhance the look of any entrance. (Photo: Alexey Koldunov /

What is a knob and what are its advantages?

A knob is a part of the door, which contains a twisting mechanism that secures and releases it to its frame. They are very easy to install, and do not require a lot of tools or expertise to fit. They usually come in metal, wood and even glass materials.

Knobs are certainly a home accessory that is both aesthetically pleasing and useful. A room with a door without one of these pieces lacks both privacy and a reason for being. There really is no excuse for not adding one to any type of entrance, doorway or wardrobe, as they are inexpensive and simple to install.

  • Easy to install and uninstall
  • Inexpensive
  • Provide privacy
  • Easy to use
  • Large number of models
  • Add to the aesthetics of the home
  • Possibility of installing locks
  • Can break if left unattended
  • Complicated removal if key is lost
  • Not very customisable

Metal, wooden and glass knobs - what to look out for?

The easiest way to classify knobs is by the material used to make them. Each material influences both their price, hygiene and feel when opened. They also contribute a lot to the appearance of the doors. No material affects the performance of these products and you can choose them for their aesthetics.

Metal knob: These are knobs made of metals such as steel, bronze, silver and brass. Their price varies greatly, as it depends both on the metal used and the treatment it has undergone. They are the most hygienic knobs, as the surface of bronze, silver and brass is toxic to many germs.

Wooden knobs: They are usually handmade models, so it will be difficult to find them in digital commerce shops. It will be easier to find them in carpentry workshops or by ordering them from independent wood carvers. Their colour and texture depends on the wood used and the coating used to protect it.

Glass: Knobs made of glass are the most expensive. The appearance of the glass will vary depending on the cuts made, as well as the stains used to colour it. They are preferable for use in bedrooms or wardrobes, as these are places where keys are rarely used. They can scratch and lose lustre with constant use.

Metal Wood Glass
Salient features Brass, copper and silver have germ-resistant surfaces Difficult to obtain Expensive, use mortise locks
Variations Steel, brass, copper and silver Multiple types of wood Multiple colours depending on glass.
Customisation Metal ageing, paints Resins that change the tone of the wood None.
Ideal for use on Exterior doors, personal rooms and bathrooms Closet doors and personal rooms Closet doors, study doors, personal rooms.

How much does a knob cost?

As simple accessories, these products are generally inexpensive. A metal knob will cost between 4 to 30 GBP, and the price will depend on its finish and the material used. Wooden knobs will have similar prices to brass ones, although it will depend a lot on the workshop where you will buy it.

Glass knobs are the most expensive, as the simplest ones without locks can cost from 30 to 50 GBP. Those with locks and more detailed designs will cost from GBP 35 to over GBP 70. It is important to know that many of these locks require special accommodations on the doors.

Buying Criteria: Factors that allow you to compare and rate different knob models

Now that you know the basics, it's time to learn what features to look for when buying knobs. Knowing these factors will allow you to choose the ideal knob for your entrance, without going through the headache of choosing models of poor quality or that are not compatible with your doors.

  • Type of door
  • Thickness range
  • Finishes
  • Locks

Type of door

The type of door you will be fitting your knob to is the first thing to consider. They all have very different design specifications, so you can't just buy a model for a wooden door and install it on a glass door. Here's how to identify knobs for each type of door.

Wooden: Wooden doors being the most common, wooden door knobs are the best-selling door knobs on the market. They can come in models with a built-in lock, or with a mortise lock, which is underneath the knob. They are easier to install than the others, as the knob only needs to be screwed into its circular socket.

Glass: Glass doors may require professional installation. This is because while some models are only installed by clamping, others require holes to be drilled in the door. It is preferable to hire an expert to make them, as this ensures your health and the integrity of the door.

Metal: Metal doors often use mortise lock knobs. Since your metal door most likely already has one, it is more convenient to buy them from hardware and hardware shops where you can easily compare models.

Thickness range

All knobs on the market have a range of compatibility with the place where they will be installed. This range refers to the thickness of the doors, it is measured in millimetres and it is very important to pay attention to this. Buying a handle of the wrong thickness will cause you a lot of headaches.

What happens if you choose a knob of the wrong range? If you install a knob on a door whose range is greater than that of the door, it will be loose and insecure. If, on the other hand, you try to install a knob whose thickness range is less than that of the door, you won't even be able to install it because it won't have enough space to be secured.

How do you know if a knob is compatible with a door? It's easy to get the right size, just measure the thickness of your door and compare it to the range accepted by the knob you want. Let's say your glass door is 4mm thick, then you should look for a knob whose usability range includes 4mm, such as 4mm to 6mm.


The finish of a knob greatly influences its price, as it is what defines its appearance. There are many types of finishes available, and you can choose them simply for their appearance as it has no influence on their lifespan or performance. Just try to choose one that looks nice on your door and matches the theme of the room.

Metal knobs: Some metals, such as brass, copper and silver, change colour and tone when subjected to certain chemicals and processes. The most common are ageing, which gives the knob an antiqued appearance, a matte coating called satin or a simple polishing. It is also possible to paint them with special paints.

Wooden knobs: The appearance of the wood depends very much on the tree from which it is obtained, and it can be light, dark and often with some kind of patterns and grooves. It is possible to darken it, lighten it and even change its colour using varnishes. If you like DIY, you can sand them and change the varnish on your own.

Glass knobs: The finish of this type of knob depends on the colour of the glass used to make it, as well as the cuts made on the knob. Try to use it in places where the constant use of keys is not required, as it is possible to scratch or break them by accident.


Since home security is a high priority for everyone, it is important to pay attention to the locks on doorknobs. To begin with, make sure that the doors to enter your home are secure against attempts to disarm them, such as drilling, locking or slamming. For bedrooms, this feature can be omitted.

Key lock: Try to make sure that the locking knobs you buy have at least two keys, as your lock will be unusable if you lose the only copy you have. Some brands incorporate a system that allows you to configure the internal mechanism, so that you do not have to change the knob in case a key is lost.

Electronic locks: Certain knobs incorporate an electronic locking system. These can be the typical models that open with cards, security codes or magnets. There are also models that can be opened both by key and by telephone via Bluetooth, although these are not recommended at present.

(Featured image photo: Yutthapol Termpornlert /

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