The Sealey 12 Piece 3/8" Drive Lock On Hexagon Socket Set is a professional-grade socket collection designed for working with metric fasteners across automotive, maintenance and general mechanical applications. Manufactured from hardened and tempered Chrome Vanadium 6142 steel, this set combines durability with corrosion resistance through its fully polished mirror finish. The standout feature of this socket set is the Lock On technology, which incorporates specially machined flutes within the socket walls. This innovative design enables reliable grip on fasteners that are up to 85% rounded, providing a solution for mechanics and engineers dealing with worn or corroded fixings. The fluted design not only facilitates removal of damaged fasteners but also adds structural strength to each socket, reducing the risk of further damage during use. Practical design features enhance usability in workshop conditions. Each socket includes a knurled ring that provides secure grip even when handling with oily or greasy fingers, a common challenge in automotive and machinery maintenance work. The complete set covers sizes from 8mm through to 19mm, offering comprehensive coverage for standard metric fastening applications. All twelve sockets are supplied on a convenient socket rail for organised storage and quick size selection. Features and Benefits: • Lock On fluted design grips up to 85% rounded fasteners for reliable removal of damaged fixings • Chrome Vanadium 6142 steel construction with mirror polish finish resists corrosion • Knurled grip ring enables secure handling with oily or greasy hands • Complete 8-19mm metric size range covers common automotive and machinery applications • Supplied on socket rail for organised workshop storage • Lifetime guarantee provides long-term investment protection Specifications: • Brand: Premier • Configuration: 6-point Lock-On™ Socket • Contents: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm, Socket Rail • Depth: Standard • Nett Weight: 0.43kg • Qty: 12 • Type: 3/8"Sq Drive - Metric • Model No. AK2741 • Lifetime guarantee*