Precision quality needle files as used in the British aerospace Industry and as supplied to the like of Rolls Royce. Fine 600 grit (25 micron) Guaranteed for five years when used with Trend Lapping Fluid. Suitable for carving tools, model engineering, small tools and removing welds. Use to file metals and plastics. Also widely used in Jewellery making industry. Pack comprises of 4 needle files, Tapered / round, tapered half flat / round, flat , triangular / tapered. Specifications Type or Grade: 600 gritPack Qty: 4 pack Contents: Supplied in a wallet DWS/NFF/F DWS/NFHR/F DWS/NFR/F DWS/NFT/F