Profile: Warrensville File & Knife Inc provides aluminum flat file, thread file internal and external, barrette, checkering, hand, crochet, flat files and crossing file sets. Our aluminum flat file is designed for use on many types of aluminum, leaving a good finish with minimum clogging to the file. Our barrette is used to remove burs from key ways, gear teeth and other flat surfaces with tight corners. Our thread file internal and external is a multipurpose tool comes in a reusable plastic tube for easy storage even in a cluttered machinists or pipe fitters tool kit without fear of chipping the precision teeth.