1970, H.Y Liao-the owner of company, started the business in a small workshop.
1975, Dot To Surface Enterprise Co., LTD. was established in Chai-Yi, Taiwan.
1998, the branch company, San Yi Chains Hardware Co., LTD. was setup in Guangdong, China.
Single Jack Chain, Double Jack Chain, Register Chain, Chain Double Torsion, Oval Link Chain, Oblong Link Chain, Dimpled Chain, Cathedral Chain, Twist Rope, Spanish Link Chain, Double Loop Chain, Lock Link Chain, Clock Link Chain, O Chain, Twist Link Chain, Machine Chain, Coil Chain, Passing Link, Utility Link, Sash Chain, Mirror Chain, Plumber’s Chain, Welded Twist Link Chain, Flat Twist Link, Weldless Chain, Grade 30 Proof Coil Chain, Plastic Chain / S Hook, Ball Chain, D Ring, Spring Hook, Quick Link, Key Ring, Snap Hook, Dog Chain, Storm Door chain, Emergency Ladder