Lever Handle Door Thickness: Which Fits a 32mm to 58mm Door

Updated 2026-11-05 · RAYEN 雷茵

Door thickness is one of the fields buyers leave off an inquiry, and it decides whether the lever, the spindle and the fixings work together. Here is how the printed ranges line up across our lever handles.

What door thickness do lever handles fit?

Each range belongs to a family of levers.

• 32-50mm: stainless steel 304 / 316 levers, such as S-01 and SF-15.
• 35-50mm: some aluminium levers, such as AL-114 and AL1-141, and the 304 stainless plates SY5801-109 and SY5802-101.
• 36-56mm: BK4008, ET4008 and ET4009A.
• 38-50mm: the zinc alloy levers, such as A5-653 and 58150-704, and the concealed door locks.
• 40-58mm: BK4006B, ET4006A, BK4018, ET4016, ET4018, ET4022 and the knob ET4017.

Tubular lever locks are separate: BK801 and BK802 print 30-50mm. See tubular lever lock backset.

Levers for thinner doors

The table starts at the thinnest range and works up.

Which levers fit at each end of the range?

Work from your door, not from the lever.

• A 32mm door: only the 32-50mm stainless levers, among the mortise levers.
• A 35mm door: add the 35-50mm aluminium and 304 models.
• A 38mm door: the whole zinc alloy list opens up.
• A 40mm to 50mm door: every printed range fits. Pick by style and lock.
• A 56mm door: only 36-56mm and 40-58mm.
• A 58mm door: only 40-58mm.

So the wide middle is easy. Choice gets tight at the ends, and the list you are left with may decide the material for you.

Why does the range have limits?

A lever passes through the door on a square spindle, and the two sides are held by fixings that span the door. Those parts have a working length. On a door thinner than the range, the spindle or screw can bottom out, and the lever will not sit flat or will bind. On a door thicker than the range, the spindle may not reach through the lock, or the screws may not reach the other side. Longer spindles and screws can often solve this, so a thickness just outside a range is a question for us, not a closed door.

Does the lock case have to fit the door too?

Yes. The lever range is only half of it. The case must also fit inside the door with wood left around it. The lock case line follows the same families:

• 32-50mm stainless: 7255 / 7855.
• 38-50mm zinc alloy: 8550 / 7255 on the rose levers, 5845 on the plates.
• 40-58mm: CF60 lift-to-lock or CT60 / 7255.

The numbers are explained in lock case numbers. If your door is near the bottom of its range, ask us for the case drawing and check the body thickness.

What if your model shows no range?

Confirm the door with us for the aluminium plates such as AL5801-117, most of the 304 plates such as SY5801-100, and the UL1005 family. Send us your door thickness and we will confirm it against the drawing before you order. Do not borrow a range from a lever that looks similar.

How do you measure door thickness?

• Measure the finished door, with facing, laminate or cladding on, at the lock position. Glazed or panelled doors change thickness across the leaf.
• Measure at the stile, not at a panel. On a panelled door the lock sits in the thick part.
• On a steel or fire door, ask what is inside the leaf at the lock. A hollow door may need a reinforcing block.
• Measure more than one door if a project mixes door types. A hotel can have a different leaf at the entrance and at the bathroom.

What to write on your order

Write the door thickness as a number on every line, not just the lever's range: model, finish, lock case, door thickness, door material and quantity. For example: S-01, brushed stainless, lock case 7255, door 32-50mm range, timber door, with your own measured thickness beside it. If your project has more than one door thickness, give each one its own line and we will match the fittings to each.