The bahco s138 is a comprehensive 138 piece combination drive socket and tool set designed for professional mechanics and engineers requiring a versatile metric and imperial fastening solution. This extensive set combines three drive sizes 1 4in, 3 8in, and 1 2in with a wide selection of sockets, screwdriver bits, crow foot spanners, and combination spanners to tackle virtually any fastening application. Supplied in a durable high density polythene case for organised storage and transportation, the set features three reversible ratchets with 60 tooth mechanisms for precise work in confined spaces. The 1 4in drive section includes 12 standard hexagon sockets, 10 deep sockets, and a flexible extension bar ideal for accessing awkward fasteners. The 3 8in drive range encompasses 16 metric sockets plus three spark plug sockets, making this set particularly suitable for automotive and plant maintenance work. The 1 2in drive selection offers exceptional versatility with 18 metric sockets ranging from 10mm to 34mm and nine imperial sockets from 3 8in to 1.3 16in, providing the torque capacity required for heavy duty applications. The comprehensive screwdriver bit selection includes pozidriv, phillips, flat, insert, and torx variants, while the inclusion of eight crow foot wrenches and 13 combination spanners 7 19mm ensures you have the right tool for restricted access situations where conventional sockets cannot be used. Features and benefits bull three drive sizes 1 4in, 3 8in, 1 2in cover light to heavy duty applications bull 60 tooth reversible ratchets enable fine control in tight working spaces bull metric and imperial socket range suits diverse equipment and machinery bull spark plug sockets included for automotive and engine maintenance bull crow foot spanners provide access where standard sockets cannot reach bull high density polythene case keeps tools organised and protected bull universal joints and extension bars enhance accessibility to awkward fasteners specifications metric imperial metric set type mixed