General description This comprehensive Draper 1/4' Sq. Dr. Combined MM/AF Socket Set (40 Piece) is designed for both professional and DIY use. It includes a variety of high-quality tools made from durable chrome vanadium steel, which is hardened and tempered for long-lasting performance. The set features both metric and imperial sizes, along with a reversible ratchet, extension bars, and various bits, making it suitable for a wide range of applications. All components are stored in a sturdy plastic case for easy organization and transport. Technical specifications Material: Chrome vanadium steel, hardened and tempered Finish: Polished Socket sizes: 12 metric (4-13mm), 9 imperial (1/4" to 1/2") Ratchet: 72-tooth reversible with quick release Extension bars: 50mm, 100mm, 150mm Additional tools: Sliding T-bar, universal joint, spinner handle, bit holder Bits: Plain slot (3-6.5mm), cross slot (No.1, No.2), PZ (No.1, No.2), Torx STAR (T15, T20, T25) Compatibility and accessories Compatible