DND · Knob

Sfera

DND technical division

A spherical knob — pure geometry. Polished and satin finishes for residential and commercial doors. The most reduced object in the DND knob catalog — a sphere on a slim collar. Reads as a small piece of architecture in chrome, almost like a fixed punctuation mark on the door.

Configure the finish

Polished Lacquered Brass

Every DND knob is available across the palette shown. Per-finish photographs aren't always published — the form stays consistent, the finish is what changes. Ask us for finish-specific renders or samples.

Choose function

Passage rosette

Latch only — no locking mechanism. The knob turns the spindle and retracts the latch. Specified for hallways, closets, pantries, and pass-through doors that never need to lock.

Add a lock body

€26.00 EUR · ex-VAT

Indicative price.
Confirm current quote with us.

In the details

A knob is the quietest piece of hardware on the door.

Material

Solid brass, finished across the DND palette. Poggi Mariani knobs combine hand-painted porcelain with brass or aged-bronze rosettes.

Finishes

Polished and satin chrome, satin chrome PVD, matt bronze.

Mounting

Standard rosette mount, fixed turn-knob — paired with the matching DND lever family on the same door schedule.

Made in

Italy. Designed and manufactured by DND in Lombardy.

Specification downloads

Drawings & catalogue sheet

The manufacturer's technical drawings and catalogue sheet for Sfera — dimensions, mounting details, finish codes, and full accessory references. Provided by DND; shared here for project specification.

Technical drawings

Sfera · Drawings & tech info

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Catalogue sheet

Sfera · Catalogue sheet

PDF · Opens in new tab

Specify this knob

Specify Sfera for your project.

Tell us the door, the room, and the cabinetry it sits with. We'll quote the right finish, ship samples to your studio, and confirm availability for the project timeline.

Inquire about Sfera