HSI

What HSI does

HSI (Hermann Schwerter Iserlohn GmbH) is a German B2B manufacturer and wholesale supplier of fastening and mounting hardware, founded in 1905 and headquartered in Iserlohn. The company operates a single unified portfolio spanning seven core product categories: solar mounting systems (covering pitched, flat, trapezoidal, standing seam, green roof, and façade applications), fastening products including wood connectors and construction screws, terrace and garden construction hardware, wheels and casters, furniture hardware, tools under the SAFE & WORK and ToolWorks brands, and the more recently added screw foundations line. HSI serves specialist trade retailers (Fachhandel) and professional installers primarily in Germany, with a wholly-owned Polish subsidiary (HERMANN SCHWERTER POLSKA SP. Z O.O.) and a French-language commercial channel extending its European footprint.

The underlying technology is conventional fastening and mounting engineering adapted to specific construction use cases, with proprietary sub-systems such as FIX-FIT (inclined-roof mounting profiles with interlocking teeth and micro-encapsulation), LayTec (façade-mounted solar systems), FLD (15° flat-roof mounting with ballast), BiGHTY bi-metal drilling screws for trapezoidal sheet roofs, and the BASE Light/Plus post support family with zinc-nickel and hot-dip galvanizing options. Products are marketed as ISO-structured quality-managed and aligned with relevant building authority requirements.

HSI's revenue model is hardware wholesale to trade retailers under quote-based B2B pricing, with no public price list. Go-to-market is sales-led, executed by an own external field sales team (Außendienst) that conducts store checks, provides product consultation, and supports retailers with Warenpräsentationen (turnkey shelf-ready product display solutions). The company complements the field motion with multi-language downloadable catalogs, 360° virtual product tours, and email newsletters, indicating a hybrid offline-plus-digital B2B trade approach. Revenue is not publicly disclosed, and HSI operates without institutional equity ownership, M&A activity, or leadership turnover in the available data.

Name

HSI

Legal name

HSI HERMANN SCHWERTER Iserlohn GmbH

Website

https://schwerter.de

Company type

Private

Founded year

1905

Operating status

Operating

Headcount range

101–250 employees

Short description

HSI (Hermann Schwerter) is a German B2B manufacturer and wholesaler of fastening, mounting, and solar hardware, founded in 1905. It supplies specialist trade retailers and professional installers across Germany, Poland, and France through an own field sales force and turnkey product display solutions.

Ownership category

akta.pro rank

Headquarters

HQ city

Iserlohn

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D

Revenue model

1. Hardware Products B2B Wholesale: HSI generates revenue through the wholesale supply of fastening hardware, solar mounting systems, casters/wheels, furniture hardware, tools, and accessories to specialist trade retailers. Products are sold in various trade forms including individual products and complete product presentations/display systems.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

HSI manufactures and B2B wholesales fastening technology and mounting solutions, including solar mounting systems for all roof types, wood construction screws and connectors, terrace and garden building hardware, wheels and casters, furniture fittings, work safety gloves and tools, and screw pile foundations. The company also provides shelf-ready product presentation and display systems for specialist trade retailers.

Product overview

HSI (Hermann Schwerter Iserlohn GmbH) is a B2B wholesale supplier and manufacturer of fastening technology and hardware products, established in 1905 and headquartered in Iserlohn, Germany. The company operates as a single unified product portfolio platform offering seven core product categories: Solar Mounting Systems (Solarbefestigung) for secure solar panel installation on various roof types; Fastening Products (Befestigungsmittel) including wood connectors, construction screws, and façade hardware under the HSeasy PRO brand; Terrace & Garden Products for deck construction; Wheels & Casters for industrial and furniture applications; Furniture Hardware for manufacturing; Tools under SAFE & WORK and ToolWorks brands; and Screw Foundations (Schraubfundamente) as a newer addition. The portfolio includes specialized mounting systems like LayTec (façade), FIX-FIT (corrugated roofs), and FLD (flat roofs), plus product presentation services for retail customers. The company serves specialist trade customers in Germany, Poland (via Hermann Schwerter Polska), and France with a focus on quality products aligned with ISO standards, complemented by individualized merchandise display solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• Solar Mounting Systems (Solarbefestigung)
• Fastening Products (Befestigungsmittel)
• Terrace & Garden Construction (Terrassen- & Gartenbau)
• Wheels & Casters (Rollen & Räder)
• Furniture Hardware (Möbelbau)
• Tools (SAFE & WORK and ToolWorks)
• Screw Foundations (Schraubfundamente)
• Product Presentation Solutions (Warenpräsentationen)

Quantifiable outcome

• Products meet relevant standards and building authority requirements through ISO-structured quality management.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Scale indicators2 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Adolf Würth GmbH & Co. KG: Germany-headquartered global leader in fastening and assembly technology, selling directly to trade and industry customers. Highly comparable to HSI in product scope (screws, anchors, mounting hardware) and B2B trade-channel focus, though at vastly larger scale.
• Berner SE: European B2B direct-selling distributor of fasteners, tools, and consumables to trades and automotive workshops. Comparable to HSI in product range and trade-customer focus, with a different (direct-sales rep) go-to-market model.
• CELO: European (Spanish/German) manufacturer of screws, fixings, and fasteners serving trade and distribution channels across multiple European markets. Overlaps with HSI's fastening product portfolio and European distribution model.
• HECO-Schrauben GmbH & Co. KG: German specialist in wood construction screws and fastening technology serving trade and professional installers. Closely comparable to HSI's HSeasy PRO wood-screw and Befestigungsmittel lines and operates in the same DACH distribution channels.
• fischer Group (Fischerwerke): German manufacturer of fixing systems, anchors, screws, and mounting solutions for construction and solar applications. Overlaps directly with HSI's fastening, wood-construction, and solar-mounting portfolios and shares the German Mittelstand industrial DNA.
• SPAX International GmbH & Co. KG: German wood-construction screw specialist with strong brand recognition among professional tradespeople. Directly overlaps with HSI's Holzbauschrauben / HSeasy PRO offerings and the same specialist retailer channel.
• TOX-Dübel-Technik GmbH: German manufacturer of plastic and metal anchoring and fastening technology for construction applications. Comparable to HSI in fastening product breadth and German specialist-trade customer base, focused on anchoring rather than solar.

Broad incumbents

• Illinois Tool Works (ITW): US-listed diversified manufacturer with significant construction-products and fastening segments (e.g., ITW Construction Products). Functions as a broad incumbent rather than a direct mid-market competitor, but competes in similar anchor/fastening categories.
• Hilti AG: Liechtenstein-headquartered global leader in professional tools, fasteners, anchors, and firestop systems serving construction trades. Adjacent rather than directly overlapping: broader portfolio, premium positioning, and global footprint dwarf HSI, but serves overlapping installer customers.

Regional players

• Sikla Group: European specialist in pipe support, fastening, and modular installation systems for industrial and building-services applications. Comparable in fastening technology focus and B2B trade-channel orientation, but with greater industrial/installer tilt versus HSI's retail-led mix.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/HermannSchwerterIserlohnGmbH
• LinkedInlinkedin.com/company/hsi-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about HSI