Teng TENT3839 Socket Set 39 Piece Metric 3/8 in Drive
They provide excellent torque, whilst reducing the risk of rounding fasteners. 1 x 3/8in-1/2in Adaptor, 1 x 3/8in Hex Bit Adaptor. This 39-piece set contains the following 2 x 1/4in Slotted Bits: 4 & 5.5mm.