Handan yifeng Fastener Manufacturing Co., Ltd is a manufacturer of fasteners with over 30 years experience and a strong technical team.We have the world&#39s most advanced four-mode four-stroke bolts machines, six-mode six-stroke nuts machines, Taiwan cold forging machines, high-speed intelligent stamping machines, specializing in the production of GB, ASTM, BSW, bolts and nuts and all types of export-oriented expansion bolts (4pcs fix bolts Antiskid Shark Fin Type Anchor Ceiling anchor Wedge Anchor Sleeve Anchor). We use professional testing equipment to provide a strong guarantee for product quality control and products have been affirmed and specify used by global customers.