Knowledge Base

What is a “Lever on Backplate”?

A “Lever on Backplate” or “Lever on plate” is a door handle that is normally used to operate sash locks. These handles are spring loaded and use a lever action inside to operate sash locks. Although, there are many operations of the Lever Handles, we have listed three main types here:

Lever on plate - explanation of types of levers on backplate

  • Latch
  • Lock
    • Standard Key Profile
    • Euro Profile
    • Oval Profile
  • Bathroom/privacy

These Door Handles on Plate are available in several variations:

  1. Latch plate (Just the plain backplate without any keyhole)
  2. Lock plate (Backplate with a keyhole for standard sash lock)
  3. Bathroom plate (Comes with a Thumbturn/Thumbturn & Release and are suitable for bathroom doors)
  4. Privacy plate (More like bathroom handle but rather than a thumb turn there is a small snib attached with the plate which locks the handle when it is in locking position
  5. Euro / Oval Profile (Quite similar to the lock plate but with a much bigger keyhole for Euro/Oval Profile Cylinder Locks and needs a sash lock case to operate this handle).
  6. PVC Handles (suitable for exterior PVC and uPVC doors).

All of our door handles are supplied in pairs with matching screws, 7.9mm thick spindle and a bathroom thumbturn for bathroom handles.

If you feel that we have not covered any of your questions here then please don’t hesitate to call us. We are quite confident and experienced to answer your technical queries.

What is an Escutcheon?

An escutcheon is simply a key hole cover used to cover the locks on your doors, and there are various types such as Standard Profile, Euro Profile and Oval profiles etc. The different types of escutcheons you will need depends on the type of lock or cylinder used on your door. You can appreciate the differences below.

Explanation of Escutcheon And Thumburns

Explanation of Escutcheon Types PlainPlain Escutcheon without any holes
Explanation of Escutcheon Types StandardStandard Key profile Escutcheon
Explanation of Escutcheon Types EuroEuro Profile Escutcheon
Explanation of Escutcheon Types OvalOval Profile Escutcheon

Explanation of Escutcheon Types

What is the difference between Standard Key, Euro and Oval profile Keys?

Standard Key profile is generally found on London Fire Brigade locks and traditional “Chubb” type locks. Whereas Euro and Oval profiles generally refer to the shape of the cylinder lock.

A cylinder lock, also known as a profile cylinder lock is a type of barrel that is fitted to the Lock case. The advantage is that the cylinder may be changed without altering the lock case hardware.

If your lock mechanism has a large keyhole shaped mechanism that uses a “Yale” type key. You will need a Euro profile handle on plate or a Euro Profile Escutcheon for the handle on Rose.

You will need an Oval profile handle on plate if your lock mechanism has a large oval shaped that you use a “Yale” type key.

Explanation of Standard Key Profile Types Standard Key TypeStandard Key profile also known as London Fire Brigade Key Profile
Explanation of Yale type Key Profile Types Yale-Type“Yale” type key profile which is used on Euro and Oval cylinder locks

Explanation of key profile types for escutcheons

How can I remove an old door handle before installing a new one?

On an un-concealed handle there should be four screws located on the face of the back plate on each handle. Unscrew these screws using a Philips / Pozi screwdriver. At this moment you should make sure you hold both the handles on either side of the door, as the handle lever and plate on the other side would get loose. The lever can be slided-off the spindle if it is pulled gently.

What locks would be suitable for a door handle without a keyhole?

Tubular Latches are the best choice for door handles without a keyhole (Latch Handle). We offer these latches in a variety of sizes and finishes such as Polished Brass, Polished Chrome, Satin Chrome, Florentine Bronze and Satin Stainless Steel to name some.

Why is Stainless Brass PVD finish much more expensive than others?

Our Stainless Brass PVD products have been treated using an advanced process involving robotic polishing, chrome plating and application of a gas and zirconium mixture. This results in a highly polished product with an immaculate finish and superior durability. For more information please visit: What does Stainless Brass PVD Finish Mean?

What is the difference between satin and polished finishes of Brass and Chrome?

Polished Chrome or Brass has a mirrored appearance whereas Satin Brass or Chrome is much less reflective.

How can I tell if  I need sprung or un-sprung handles?

Most handles will be sprung, meaning they will return back to the original position once depressed. If you have a heavy sprung latch mechanism you do have the choice of having un-sprung handles, but these are not very common.

Ideally if you want the handle to come back again, it is best to go for a sprung option.

How do I install my door handles/locks/latches/hinges?

Please visit our Installation Guides section.

What is backset/ What backset size do I need?

Backset is an ironmongery term which describes a specific measurement. The backset size on a lock or latch case is the distance from the edge of the door to the centre of where the handle spindle passes through the door (or the key / turn where applicable), this is shown as dimension ‘x’ in the diagram.

latch and Lock backset dimensions

Locks and latches in the UK are quoted and sold based on the total depth measurement as dimension ‘y’ on the diagram. For example, a 2 1/2 inch or 65mm latch has a backset size of 44mm and a total depth of 65mm.Generally these measurements apply to all locks and latches we supply.

2 1/2 inch latch backset dimensionsAll 2 1/2 inch (65mm) locks/latches x=44mm and y=65mm
3 inch latch backset dimensionsAll 3 inch (78mm) locks/latches x=57mm and y=78mm
4 inch latch backset dimensionsAll 4 inch (103mm) locks/latches x=82mm and y=103mm
5 inch latch backset dimensionsAll 5 inch (128mm) locks/latches x=107mm and y=128mm

Rules to Bear in mind:

  • For door knobs you need a minimum of 3 inch case depth locks, we do however recommend 4″ or 104mm latches providing that these fit your doors. This is to prevent your hand from scraping on the door frame when closing the door.
  • Fire doors generally have a deeper frame rebate (overlap around the door!). This means you need a minimum of 3 inch case depth locks.
  • When replacing old locks, the critical dimension is “x” as above, but this can vary by 3 to 4mm, so don’t worry if you are slightly out. This is needed to prevent filling and redecoration of the door.

Backset Explanation

What type of locks or latches do I need for my doors?

There are various considerations that you need to have in mind before choosing a door lock, so if not sure please contact us.

A Tubular Latch is suitable for internal doors where no security considerations are required. In fact 64mm latches are fitted to door handles and 76mm to door knobs. If you are going to fit a lock to an internal door, a 3 lever mortice lock is a more appropriate choice. The same types of locks or latches can be used for door handles on a backplate, door handles on a rose and door knobs.

For information on the sizes of locks and latches please see FAQ ‘What Backset size do I need?’

  • Internal doors: All internal doors that don’t require locking need a tubular latch, we supply a contract latch and a quality tubular latch, the difference being the overall quality and the tention of the spring. Your budget will dictate which one you would purchase. We always recommend the quality tubular latch, as this feels solid and smooth in use whilst providing a long working lifespan. For unsprung door knobs (all Delamain door knobs are unsprung) we also recommend the Delamain door latch. This is a high quality door latch with a medium tension spring which will make the knobs easy to operate without being too stiff in use,
    • *IMPORTANT* please see FAQ’s for recommended latch sizes.
  • External locking doors: It is important that all external doors have either a British Standard Certified 5 lever sash-lock or a rim cylinder night-latch used with a Bristish Standard Certified 5 lever deadlock. This is a minimum security standard required by most UK household insurance provider. If you do not have these fitted to your external doors your insurance company may contest your claim in the event of a break-in.
  • Internal locking doors: Internal doors that require locking with a key can use a 3 lever sash-lock providing they are not “Exit doors”. We do not recommend locking internal doors for fire safety reasons.
  • Bathroom doors: All door handles supplied by Stylish Door Handles can use a bathroom lock. We supply a high quality bathroom lock and acontract bathroom lock, the difference being the quality. The quality lock is engineered to a high standard that will feel solid and smooth in use and provide a long working lifespan, the contract lock is engineered to a budget price. When using Door Handles on Rose in conjunction with a Turn & Release you may use any of the above bathroom locks or simply add a tubular bathroom deadbolt. By doing this you can position the Turn & Release independently of the handle.

What locks are suitable for a door handle with a keyhole?

You would need a Mortice Sash Lock for a door handle with a keyhole. Mortice sash locks are fitted (mortised) inside the door and features a deadbolt and a latch. The latch would keep the doors shut without the need of a key while the deadbolt performs the actual locking function (locking mechanism) for the doors. These sash locks are available in black, brass and nickel finishes to name a few.

Can I fit a latch and a lock on the same door?

Yes you can, and there are several ways of doing this. A sash lock is essentially a latch and a deadbolt lock combined in one case. And if preferred the door handle could work just on a latch, with maybe two additional dead lock bolts fitted with one above and one below the latch on the door.

There is no limit to what you put on the door!

How can I tell what type of lock is already fitted on my door?

The handle on the door is often a good indicator of the type of lock fitted to the door. Often you can easily tell if the handle has a backplate, and if there is no keyhole, it generally means you just have a latch and there might not be any lock.

If you have a traditional key-hole, then you will more than likely have a sash lock, and if there is a large oval or larger key hole shape protruding slightly from the door, you most probably will have a cylinder lock fitted, either an oval or euro cylinder lock. If your door have no handles and there is only a keyhole, then this is what we call a deadlock.

When would I need to use a deadlock?

You can use a deadlock for additional security or it can be used with existing locks or just used as a lock for a door with a latch on backplate. Deadlocks can also be used for garden sheds, fences or anything that needs a lock fitted to it, as it is quite a universal lock.

Schematic of a Dead Lock

What size door hinges do I need for my doors?

Generally all external doors are 44mm thick and fire doors are 40mm thick, these doors require 4″ or 102mm door hinges and require 3 hinges per door. (All door hinges are priced and supplied in pairs, that is when you purchase a quantity of 1 unit, you will receive two individual hinges).

For internal (non imperial sized doors) you will normally fit 3″ or 76mm door hinges, these doors are generally 35mm thick and a 4″ hinge leaf will be too wide. For doors over 20kgs most door manufacturers recommend fitting three hinges per door, we advise that you consult your door supplier if not sure.

Please visit our Detailed Guide to Buying Hinges for more information.