1. When filing, the file must be used with a handle to avoid stabbing the palm of your hand.

2. Don't file on the lower jaw because the tiger's malocclusion has been treated by fire, so as not to file dullly and damage the lower jaw.

3. Don't touch the surface of the file or workpiece with your hands, so as not to be stabbed by sharp edges. At the same time, you should also prevent the oil on your hands from touching the surface of the file or workpiece, causing the file to slip and cause accidents.

4. Clean the filed debris with a brush, and don't blow it with your mouth, so as to avoid debris entering your eyes.

5. After the file surface is blocked, use a wire brush to brush off the debris along the file grain direction.

6. When the file is placed, don't stick out of the workbench to avoid bumping, breaking or hurting the instep.

Extended data:

Types and specifications of documents

Files can be divided into ordinary files, plastic files and special files according to their uses. Commonly used ordinary file, its specifications are generally expressed by section shape, file length and tooth thickness.

1. According to the section shape, it can be divided into five types: flat file, square file, round file, semicircular file and triangular file.

2. According to the length of the working part, it can be divided into 100, 150, 200, 250, 300, 350 and 400 mm.

3. According to the tooth type, it can be divided into single tooth file and double tooth file.

4. According to the thickness of tooth pattern, it can be divided into coarse teeth, medium teeth, fine teeth and smooth files.

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