Flat Double Cut Smooth File, 12 in ORS NASCO Polished face and pein Rim tempered face Polished face and pein Rim tempered face minimizes chipping and assures greater safety General purpose sealant seals medium to coarse straight and tapered pipe threads and fittings Controlled lubricity prevents galling and protects mated threaded areas from rust and corrosion ship and engine builders Can be used effectively by repairmen and others who require rapid removal of metal Rectangular cross section allows you to smooth and sharpen straight surfaces while slight taper in width towards the file's point creates ease of access in slots Double cut on the sides for rough filing and single cut on the edges for a smooth finish