Steel: Made from durability steel with heat and grinding for enhanced hardness, shock resistance, and long last Ergonomic NonSlip Handle: Equipped with textured grips and contoured handle for comfortable and secure hold, reducing hand fatigue during prolonged use even in wet conditions Complete 4Piece Set: Includes 6inch, 8inch, 10inch, and 12inch adjustable wrenches to handle various tasks from small repairs to large plumbing and mechanical work, suitable for home, automotive, and industrial use Innovative auto Locking Design: Features an automatic locking mechanism that prevents slippage during use, ensuring secure grip on nut and bolts for safe and more efficient operate Wide Jaw Opening: Designed with a large jaw capacity to fit oversized nut, pipes, and mechanical bolts, offering versatility compared to standard wrenches, Manufacturer: Jazuaiao