Teng Tools 21 Piece 1/2"" Drive Bi-Hex 12-Point Socket, Ratchet, Tool Set & Case. Model: T1221. Teng Tools sockets are manufactured from strong chrome vanadium steel in accordance with ISO9000 and AS954. They provide excellent torque, whilst reducing the risk of rounding fasteners. This T1221 1/2 inch drive metric socket set comprises 21 pieces, which are supplied in a plastic carrying case which has a snap lock lid and metal pin hinges. This set contains the following: 16 x 12-point sockets: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24, 27, 30, 32mm. 2 x Extension bars: 2.1/2 inch and 6 inch. 1 x Universal joint. 1 x 1/2 inch to 3/8 inch Adaptor. 1 x 1/2 inch drive reversible ratchet. Supplied in plastic box with snap lock & metal hinges.