Steel: Made from durability steel with heat and precise grinding for enhanced hardness, shock resistance, and long last 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 Wide Jaw Opening: Designed with a large jaw capacity to fit oversized nut, pipes, and mechanical bolts, offering superior versatility compared to standard wrenches 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 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, Manufacturer: YUEHUINIAO