TIEN-I has manufactured sockets in Taiwan for a long time. The designs of sockets provide more powerful tightening between sockets and fasteners. Torque is transmitted through the fastener flats, so stress concentration in the corners is eliminated. The sockets are made of Chrome Vanadium Steel (CR-V) for durability and with various surfaces processing, such as mirror finish, mat finish, Knurling, twin finish, easy read ribbon, single groove, or twin Groove.

All socket and socket accessories meet or exceed ANSI and DIN standard. TIEN-I provides the completed size variation of standard sockets (6 point and 12 point) from 1/4”DR. to 1/2”DR. There are three different lengths have been designed-standard, semi-deep and deep.

TIEN-I is providing a series of special sockets, such as spline sockets, star sockets, spark-plug sockets, 8 point sockets and universal joint sockets. These special designed sockets could be used in many territories, such as auto repair industry, aerospace industry or construction industry.