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Jiashan YONGGU Metals Making Co., Ltd. is a company specializing in the production of self drilling screws. Its main business is to produce a series of self drilling screws, such as hex head self drilling with washer, Pan head self drilling, Washer head self drilling .

flat head self drilling screw,pan head self drilling screw,washer head self drilling screw.hex headself drilling screw,drywall self drilling screw,drywall screw and self tapping screw