They are made in various shapes, cuts of teeth and length. Single cut files are used for sharpening tools and finish filing. Double cut files are used for rough work and removal of metal. When filing soft metal, small particles of the metal will remain between the file teeth. This will cause the file to scratch the metal that is being worked on. To clean the teeth a file card brush is used. This is a combination wire brush and a bristle brush; the wire side is run across the file teeth and they are then cleaned off with the bristle side. Steel Wire Brushes are used for removing old paint and rust. Terminal brush is a conical brush with wavy steel bristles for cleaning clamps. Inserted card brush is used for cleaning battery posts. Snips are used for cutting sheet metal or other thin pieces of metal. The straight snips have straight blades and will cut along a straight line. Snips with curved
vestigation of the pros and cons, or one in which we are experts-but we do want to be able to count on others' behavior as a source of valid information in a wide range of settings. If we find in such settings that we cannot trust the information to be valid because someone has tampered with the evidence, we ought to be ready to strike back. In such instances, I personally feel driven by more than an aversion to being duped. I bristle at the thought of being pushed into an unacceptable cor- ner by those who would use one of my hedges against the decisional overload of modern life against me. And I get a genuine sense of righteousness by lashing out when they try. If you are like me-and many others like me-so should you. Looking Up In addition to the times when social evidence is deliberately faked, there is another time when the principle of social proof will regularly steer us wrong. In such an
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