General description Bahco S138 1/4in, 3/8in, and 1/2in drive socket set is a comprehensive 138-piece metric and imperial tool kit, ideal for engineers, mechanics, and DIY enthusiasts. The set is made from high-performance alloy steel and comes in a durable high-density polythene case, ensuring easy organization and portability. Technical specifications Drive Sizes: 1/4in, 3/8in, and 1/2in Number of Pieces: 138 Socket Types: Hexagon, Deep Sockets, Spark Plug Sockets, and more Reversible Ratchet Teeth: 60 Case Material: High-density polythene Set Includes 12 x 1/4in Hexagon Sockets: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, and 13mm 10 x 1/4in Hexagon Deep Sockets: 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13mm 1 x 1/4in Reversible Ratchet (150mm) 1 x 1/4in Spinner Handle (150mm) 1 x 1/4in Sliding T-bar (106mm) 2 x 1/4in Extension Bars: 50mm & 100mm 1 x 1/4in Universal Joint 1 x 1/4in Bit Holder 1 x 1/4in Flexible Extension Bar (150mm) 16 x 3/8in Hexagon Sockets: 6 to 22mm 1 x 3/8in Reversible