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Phillips Round Collar Head Self-drilling And Tapping Screws
The drill tail screw is a kind of wood screw. The drill tail screw is a screw with a self-tapping drill head at the front end of the screw, also called a self-drilling screw. According to the different types of drill tails, it can be divided into: round head rice / cross / plum, countersunk head (flat head) / rice / cross / plum, hexagonal Huashi, round head Huasi (large flat head), trumpet head and so on.
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