Apart from the mines themselves, Camborne was also home to many important related industries, including the once world-renowned foundry of Holman Bros Ltd (CompAir). Holmans, a family business founded in 1801, was for generations, Camborne's, and indeed Cornwall's largest manufacturer of industrial equipment, even making the famous Sten submachine gun for a stint during the Second World War. The Holman Projector was used by the Royal Navy. At its height Holmans was spread over three sites within Camborne, employing some three and half thousand men. Despite Britain's industrial decline, Compair Holmans Camborne factory finally closed in 2001. On the afternoon of Tuesday 5 December 2006, a wall of the Holmans factory was leaning towards the railway line, as a result the line west of Truro was closed for the afternoon and night and disrupting railway services, as it was feared the wall could collapse onto the mainline, part of the derelict factory was later demolished that night.