CDF OB-50 key door escutcheon

The iron bedroom key, also known as an L key or OB key

This rose takes a long, toothless key known, depending on the region, as a bedroom key, L key, OB key or Patent key. Its elongated keyhole makes it easy to distinguish from a cylinder rose. This is the traditional fitting for bedroom doors. It is forged from iron, the material used in Dauby’s CDF – Créations du Fer – collection. It is fitted as a pair, with one rose on each side of the door.

Included

• A pair of roses, left and right
• Two M4 through-bolts to secure the adapters to the door
• Set of wood screws, on special request
• Assembly instructions in French
• Material: iron
• 24-month manufacturer’s warranty

Compatibility

Designed for wooden doors of any type up to 44 mm thick. For thicker doors, tell us the thickness in your order comments and we’ll adapt the fitting kit. To understand the differences between types of roses, see our article on handles mounted on roses.

Dauby, a Belgian foundry

Dauby makes its handles to order in Belgium across two collections. Création du Fer, which includes this model, is made entirely from solid iron: each piece is cast in a sand mould and then finished by hand in one of three finishes: polished iron, black (aged iron) or waxed rust. Inspired by the latches of old farmhouses, its authentic designs suit both characterful homes and more contemporary, wood-led interiors. PURE, the other collection, uses these traditional techniques to create clean lines inspired by the Bauhaus, in white bronze, raw bronze, raw metal or aged iron.

Care

The iron finishes are lacquered or varnished. No coating is completely scratch-resistant: a ring, a sharp object or everyday use can leave marks, adding to the piece’s character. If the black lacquer is damaged, it can be touched up with RAL 9005. The waxed rust finish is deliberately rough and grainy: do not polish it; care for it with beeswax or petroleum jelly. Never use abrasive cleaners.