Two patterns of Clasp Knife were supplied to the Australian Military Forces by the Carr Fastener Company. These clasp knives were identical to those made by Whittingslowe Engineers and were obviously made in the Whittingslowe Factory under contract to Carr Fasteners. William Whittingslowe, had a close association with Carr Fasteners prior to WW2 and had been the Chairman of Carr Fasteners for some time.