FSB 1058 Door Lever Set • Casson

FSB 1058 is part of FSB's Standard Mortise Lock (SML) program — German-engineered architectural door hardware known for precise proportions and a tactile, ergonomic grip.

Johannes Potente's own favourite, FSB 1058 reinterprets the earlier FSB 1051 with a flowing silhouette and crisp lines. It is one of four Potente designs held in the permanent collection of the Museum of Modern Art, and appears in Zaha Hadid's Opus tower in Dubai.

Available in passage, privacy, single dummy, and double dummy configurations. Handing is required for single dummy.

Specifications

Lever dimensions: L 128 mm (5.04") × D 57 mm (2.24")
Rose / escutcheon: Ø 55 mm (2.17")
Door thickness: 45 mm (1.77") standard
Function Options:
- Passage: Latches without locking, for doors that don’t require privacy · Backset 70 mm (2.76") standard · M1 spring latch
- Privacy: Locks from one side with a thumbturn and emergency release · Backset 70 mm (2.76") standard · M1 spring latch
- Single Dummy: One fixed, non-latching lever for push/pull doors · Backset 70 mm (2.76") standard · Handing required
- Double Dummy: A fixed, non-latching lever on each face · Backset 70 mm (2.76") standard · No handing required

Important: European roses are typically smaller than standard North American models, with many measuring approximately 50 mm in diameter. Rose sizes can vary by brand and range, so please review all dimensions carefully. These handles may not fit existing or pre-bored door holes without adjustments.

Materials

Solid stainless steel or anodized aluminum, depending on finish.

Available Finishes

Satin Stainless Steel
Polished Stainless Steel
Natural Anodized Aluminum
Aluminum Pure Natural
Dark Bronze Anodized
Black Anodized
Black Powder Coat

Product Downloads

Product Sheets

Authenticity

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