Design Hardware, incorporating the former Knob & Knocker retail outlets, is a specialist architectural ironmongery chain of stores in Johannesburg that form part of the Steinbuild Ironmongery & Hardware division of JSE-listed company, Steinbuild Africa Trading (Pty) Ltd. 

Design Hardware caters for residential homes, lifestyle developments and commercial projects – including major office blocks, hotels, shopping centres and casino developments.

Product ranges include:

Design Hardware is proud to be associated with local architectural ironmongery suppliers such as Dorma, Assa Abloy, Howick, Hillaldam and Cisa. World renowned Italian brands, Manital and Reguitti, are available exclusively from Design Hardware in South Africa.

Suppliers to Design Hardware of bathroom accessories include Di Bella and Bobrick.