NI-Foundry, previously known as Guestro Casting and Machining a pision of Dorbyl Ltd, is a large foundry casting 150 to 200 tons per day of steel and iron products. The foundry forms part of the Naledi Inhlanganiso group since 2013 when it was acquired by the current owners. The foundry produces high quality castings to various market sectors ranging in size from 1 kg to 9 tons.