Haiyan Shangjia Hardware Co., Ltd. Was established in 2008,we are Professional and, We focused on R & D and production of Adjusting bolts and parts,Our Company owns several sets of multi-station molding machines, Respectively 84L, 134L, 135L, 14B6S and other ancillary equipment. We Have a wealth of practical experience from product mold design to Adjusting bolts production. Our company newly purchased automatic Optical screening machine to further ensure the consistency of the Finished product quality.Our Adjusting bolts are widely used in Automobiles, household appliances, furniture, construction and other Industries. Adjusting bolts are mainly exported to Europe and Japan