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The Alchin Long Group

Established in 1974, the Alchin Long Group is the parent company of leading global hardware brands Doric, Cowdroy, Colonial Castings, Azuma and Australian-based Lock & Roll.

Our Companies

The Alchin Long Group has a diverse portfolio of companies that provides wide ranging products and services, including industrial design, manufacturing and maintenance as well as cutting-edge research, testing capabilities and after sales service. 

Contact Us

For any enquiries about the Alchin Long Group or our brands, please get in touch.


Our Company Story

Behind every product is a story, beginning in a racehorse stable in Annandale, ALG has grown from a sand casting foundry into a globally traded business group that owns five major Australian brands: Doric Products, Cowdroy, Colonial Castings, Lock & Roll and Azuma Design.

The group has expanded in the past four decades to become a multinational family-owned business supplying innovative products and services around the globe.

Our People Story

The Alchin Long Group has become what it is today by putting people first. Empowering our people to create innovative solutions

Our Innovation Story

ALG developed its own design, development and testing capability to ensure its products met the highest possible quality and performance parameters.


Doric Wins Design Award For DN8000 Self Latching Multi-Point System

Doric Wins Design Award For DN8000 Self Latching Multi-Point System

June 14, 2017

Leading Australian hardware manufacturer, Doric has received a 2017 Good Design Selection in the Product Design category at the Good Design Awards.

Doric wins Most Innovative Component at AWA AusFenEx 2016

Doric wins Most Innovative Component at AWA AusFenEx 2016

August 29, 2016

Leading Australian hardware manufacturer, Doric, has taken out the title for the Most Innovative Component at the AWA AusFenEx 2016 awards.

Proudly showcasing Doric at Archidex 2016

Proudly showcasing Doric at Archidex 2016

August 10, 2016

Over the 20th to 23rd, July Doric was a proud exhibitor at the 2016 Archidex, an international architecture, interior design and building exhibition, held at the Kuala Lumpur Convention Centre in Malaysia.



Doric began in Sydney, Australia in 1972, as a hardware manufacturer supplying innovative door and window hardware for residential, commercial and architectural applications. Today, Doric has a global footprint which includes a network of branches located in Australian capital cities and regional locations as well as throughout Asia-Pacific (Doric Products Asia Pacific Sdn. Bhd., Kuala Lumpur, Malaysia) and Auckland, New Zealand.

With a strong focus on R&D and a global reach, Doric is able to provide the highest level of design, testing, service and delivery standards our clients demand. Doric has been awarded multiple AWA (Australian Window Association) Design Awards to date, including ‘Most Innovative Component’ in 2007 and 2009.



Cowdroy is an Australian manufacturer of door track systems and accessories, with operations beginning in 1890. For the past century Cowdroy has maintained extremely high standards in the design and manufacturing of its products, which is still evident in each product today, from door seals to door tracks and weather seals. Cowdroy products are available from leading hardware and home improvement stores across Australia, with Cowdroy continually researching, designing and developing new and exciting products with Australian market demands in mind.



Azuma is an independently accredited testing facility and one of Australia’s largest privately-owned compliance testing and engineering companies. Azuma offers a wide range of industrial design, engineering and testing services throughout the Asia-Pacific region, including load testing, cycle testing, impact testing, accelerated corrosion testing and wind and water penetration testing. With both NATA and IQNet accreditation, Azuma is capable of testing to Australian and international standards.


Colonial Castings

Colonial Castings has its own dedicated aluminium moulding facility operating based in Sydney Australia. Colonial Castings have two main areas of product; security door components & accessories for the home and the design and manufacturing of outdoor furniture. Colonial Castings Manufacture and distribute through a network of retailers and distributors throughout Australia.


Lock & Roll

As the service and maintenance division of the Alchin Long Group, Lock & Roll is a Sydney-based home repairs company which specialises in repair and replacements for windows and doors. Lock & Roll has established trade related best practices to ensure reliable repair of most window and door problems. Customers of Lock & Roll can be assured of consistent applications of work to all window and door repairs as well as security problems. Franchise owners arrive on site with fully equipped vans so that they can get on with the job as soon as they arrive.

About us

Established in 1974, the Alchin Long Group is the parent company of leading global hardware brands Doric, Cowdroy, Colonial Castings, Azuma and Australian-based Lock & Roll.