Internal door handles from UAP cover every opening inside a building, from passage doors and bedrooms to bathrooms and store cupboards. Our range sits under the Intelligent Hardware label and spans levers on rose, levers on backplate and mortice knob furniture, supplied in more than fifteen finishes. Every set of internal door handles arrives with bolt-through fixings and an Allen key, and carries a five-year guarantee. UAP Limited operates as part of Allegion, so the same catalogue serves a homeowner replacing a single lever and a contractor fitting several hundred.
Interior door handles divide into three families: the lever on rose, the lever on backplate and knob furniture. Each family changes what the door face looks like and how much of the lock stays visible. The lever on rose sits on a small circular or square plate around 51 mm across and leaves the keyhole or bathroom turn to a separate matching accessory. The lever on backplate carries the lever and the lock aperture on one rectangular plate between 118 mm and 188 mm long. Knob furniture replaces the lever with a turned or moulded knob on a rose, in profiles such as mushroom at 56 mm and golf ball at 61 mm.
The lever remains the default across our internal door handles because it needs one downward push rather than a grip and a twist. Levers work for wet hands, gloved hands and small children, and they suit doors opened dozens of times a day. Knob furniture asks for a firmer grip and turns the wrist, so it belongs in period rooms and on doors used occasionally, such as a linen cupboard or a study.
Lever profile separates the families visually. Our internal door lever handles come as square levers and round levers, with straight, tapered, curved and knurled tops. A square lever reads as contemporary and pairs with square roses and flush doors. A round lever softens the line and sits comfortably against panelled doors and traditional architraves.
Internal door handles on rose fix through the door with a bolt-through connection, so no screw heads appear on the visible face. Two threaded bolts pass through the timber and pull the two roses against each other. That grip holds the lever square under daily load and stops the wobble that develops when a rose is screwed only into the door skin. Every rose set we supply includes the fixings and the Allen key needed to tighten it.
Rose shape is the first decision within our internal door handles on rose. Round roses across our range measure 51 mm to 54 mm and carry lever lengths from 125 mm to 150 mm. Square roses measure 50 mm to 58 mm and pair with levers from 130 mm to 158 mm. Concealed roses hide the fixing collar entirely and leave a thin disc against the timber, which suits flush doors and painted joinery where any visible plate breaks the line.
A concealed square rose also changes how the accessories look, since the matching escutcheons follow the same 52 mm profile. Choosing internal door handles on rose means committing to that profile across the whole floor, because a round rose lever next to a square rose escutcheon reads as a mistake even at a distance.
Dual finishes belong to internal door handles on rose in particular. Combinations such as polished chrome with satin chrome, polished nickel with satin nickel, or black nickel with chrome put a bright lever against a muted rose. Single finishes hold their own on plain doors, and matt black, gun metal grey and pearl nickel carry a room without any contrast at all.
Lift and lock levers operate locks that need the handle raised before the key turns. Pushing the lever up throws the locking points, the key then secures the mechanism, and the lever cannot be pressed down until the key releases it. Our lift and lock internal door lever handles carry the suffix EXT in the product code, so a single series can appear on the door as a standard sprung version and as a lift lever version.
That matters for design continuity across a floor of interior door handles. A property with a lift lever mechanism on one opening and standard latches elsewhere would normally end up with two unrelated handle designs on the same landing. Several of our round rose series run in both actions, so the same lever profile and the same rose cover every door regardless of what sits inside it.
Lift and lock levers also change the fitting brief. The handle alone does nothing without a lock case designed for a lifted spindle, and a lift lever fitted to an ordinary tubular latch will feel loose and defeat the point. Check the lock case first and specify the internal door lever handles second. Where the lock case is an ordinary latch or a standard mortice sash lock, a sprung lever on rose is the correct answer and a lift lever is not.
Internal door handles with lock functions follow a fixed grid, and every backplate in our range is coded to one of six positions. Latch covers a door with no lock at all. Lock takes a bit key mortice lock. Euro lock takes a euro cylinder, usually on 47 mm centres. Oval takes an oval cylinder. Bathroom takes a turn and release. Privacy takes a snib-style lock without a key. Reading the code before ordering removes most returns in this category.
Backplate handles suit rooms where the lock and lever should share one plate. The plate covers the keyhole and the turn together, so the door needs one fixing operation instead of three. A long latch backplate at 150 mm also hides fixing holes and paint shadow left by earlier hardware, which is the practical argument for a backplate on a refurbishment rather than a new build. Rose handles reach the same functions through separate accessories. A passage door takes a lever on rose over a tubular latch and nothing else. A bathroom takes the same lever plus a bath turn and emergency release. A lockable study takes the lever plus a standard keyhole escutcheon or a euro escutcheon, depending on the lock case. Internal door handles with lock accessories fitted this way let one lever design run through a whole property while each door does something different.
Internal door handle sets are supplied as a pair of levers, two roses, the through-bolts and an Allen key. The lock case, the latch and the visible lock accessory are separate items, and this is where most orders go wrong. A lever set on its own turns a latch. Anything that needs a key, a cylinder or a bathroom turn needs a matching accessory chosen at the same time.
Four accessory types complete internal door handle sets for every room in normal use:
Each of these follows the rose profile of the lever it accompanies. Round rose accessories measure 51 mm, square and concealed square rose accessories measure 52 mm, and the bulk-packed range uses a 49 mm profile. Finish codes run in parallel across levers and accessories, so a polished chrome and satin chrome lever takes a polished chrome and satin chrome escutcheon under the same code convention.
Mortice knob furniture takes its own accessory set. Our oval thumbturn for mortice deadbolts runs on a 5 mm spindle and comes with or without a coin release, the version that lets a bathroom or cloakroom be opened from outside in an emergency. Specify the coin release wherever a door might be locked with someone behind it.
Our Essential Range answers the same problem at the counter. These are pick-up-and-go internal door handle sets selected by our hardware team, packed with full customer literature and fitting instructions, and aimed at merchants whose customers buy one door at a time rather than a schedule.
Material sets the wear life of internal door handles more than any styling decision. Our range runs across three substrates, and each answers a different brief. Plated zinc and aluminium alloys carry the widest choice of finishes and the broadest price range. Recycled aluminium sits in the Eco Series. Stainless steel handles the heaviest traffic.
The Eco Series uses aluminium recovered from recycling rather than smelted from ore. Recycling aluminium takes about five per cent of the energy needed to produce the same metal from raw material, so substrate choice does real work on the embodied carbon of a fit-out. These sets are bulk packed in boxes of ten, which matches the way a fabricator or a developer actually buys.
Stainless steel is the answer for schools, care settings, houses in multiple occupation and any corridor where doors take constant use. Satin stainless and polished stainless resist scratching and finger marking better than plated surfaces, and they hold their appearance without the periodic polishing a brass finish expects.
Finish choice runs wide across our interior door handles. Polished chrome and satin chrome remain the neutral defaults. Satin nickel and polished nickel bring a warmer grey. Matt black, gun metal grey and pearl nickel carry contemporary schemes. Polished brass, matt antique brass and bronze suit period properties and rooms with warm timber. Black nickel plating gives a dark finish with more depth than paint.
Our internal door handles serve four groups, and each buys the category differently. Homeowners and renovators buy in small quantities and choose on appearance, then discover the lock question afterwards. This group needs the accessory decision made at the same time as the lever decision, which is why our sets carry matched accessory ranges under one finish code.
Door fabricators and joinery workshops buy internal door handles on fit and repeatability. They need consistent spindle sizes, predictable rose diameters and backplate centres that match the lock cases already in the workshop. Bolt-through fixing matters more here than anywhere else, because a handle that loosens in the first year becomes a warranty visit to a door the workshop has already delivered.
Developers, housing providers and landlords buy on schedule and on total cost across hundreds of doors. Our Developer Range exists for this group, with a narrowed selection of profiles and finishes that cover a whole site without the specification drift that appears when every plot gets a different lever. Bulk packing in boxes of ten sets reduces handling on site.
Heritage and conservation work forms the fourth group of buyers for our interior door handles. Victorian scroll, Victorian straight, heavy scroll and the named period backplate patterns give an interior door the plate proportions the room was built for. Mortice knob furniture in glass, brass and bronze finishes belongs here too. A concealed square rose in matt black on a Georgian panelled door is technically sound and visually wrong, and that is the line this group is buying against.
Our internal door handles carry a five-year guarantee, and the reasoning behind that guarantee sits in the construction. Bolt-through fixing holds the lever square under load. The spring return brings the lever back to horizontal without depending on the latch spring alone. Every set ships with its fixings and Allen key, so the fitter opens one box rather than three. Documentation supports the specification of our internal door handles. Tech sheets, brochures, maintenance sheets and product guarantee documents are published for the range, and products are certified where certification applies to the product type. A specifier writing a schedule can pull the dimensions, the finish codes and the function codes from one source rather than assembling them from a supplier’s product listings.
Breadth of the interior door handles catalogue is the second argument. More than fifty lever designs, seventeen backplate patterns, a stainless steel range, an Eco Series and a Developer Range mean one supplier covers a whole property. Interior door handles bought from a single catalogue share finish naming, accessory profiles and code structure, and reordering three years later returns the same product rather than a near match. UAP Limited operates as part of Allegion, a manufacturer working on security around the door across homes, schools, businesses and institutions. Internal hardware sits alongside our external door hardware, window hardware and locking systems, so a project served by one account covers every opening in the building.
The best interior door handles for a project are the ones that match the lock case, the traffic level and the door style, in that order. Start with the lock. A passage door needs a lever on rose over a tubular latch. A bathroom needs a lever plus a bath turn and release, or a bathroom-coded backplate. A lockable room needs the escutcheon that matches the cylinder or bit key lock already fitted. Traffic decides the substrate of the interior door handles you pick. A domestic bedroom door opens a few times a day and a plated finish lasts decades. A school corridor, a rented flat or a busy office corridor takes hundreds of operations a day, and stainless steel earns its cost there. Between the two, our Developer Range profiles hold up well on doors that are used hard but not continuously. Style decides the internal door lever handles family and the profile. Flush contemporary doors take square roses and square levers such as Cube, Sable or Scimitar. Modern homes with panelled internal doors take round rose levers such as Zeta, Truro or Lincoln. Period properties take backplate patterns such as Victorian Straight, Kensington or Chelsea, or mortice knob furniture in brass and glass. Volume housing takes the Developer Range profiles including Ventura, Knurled and Lancer.
One rule closes the decision. Choose the lever design once, then apply it across every door in the property and vary only the accessory behind it. A house with four lever designs and matched escutcheons looks unresolved. A house with one lever design and four different accessories looks specified. That is the whole logic of internal door handles on rose, and it is the reason the rose family now outsells the backplate family in new build work while backplates still win most refurbishment jobs.
Backplate lengths across our range run from 118 mm through 150 mm, 170 mm, 180 mm and 185 mm to 188 mm, with plate widths between 38 mm and 48 mm. Measure the old plate before ordering a replacement, because a shorter plate exposes the marks the previous one covered.
