Large Needle Files Large Needle File Half Round. Gritted length 11.5cm. Overall length 180mm, shaft 5 mm approx. Tapering from 9 mm to a point. Use with or without a Handle, fits the LNFH Handle with 5mm collet. Unlike conventional Needle Files, Perma-Grit cut in any direction and will cut Plastics, Woods, Fibreglass, Ceramics, Stone, Carbon fibre, PCB, Kevlar, Laminates, Polystyrene etc. Complex sanding in confined places. Fine grit equivalent to UK 320 grit sandpaper.