... samples.Our current products include:1) Abrasive discs steel back, size 4-7", single/double row, round/abnormity holes, with/without spanner ... grooved, etc,3) Fasteners, washer, hex nuts, bolts, screws, etc.4)Certificate: ISO9001:2000Fuzhou Kaisheng Precision Machinery Co., Ltd.Contact: ConnieTel ...