General description Neilsen 3pc Adjustable Aluminium Waterpump Stilsons Monkey Pipe Wrench Pliers are versatile tools designed for various applications. Made from durable 40CR material, these pliers feature a strong and robust construction, ensuring longevity and reliability. The innovative design includes a large opening range and a self-locking mechanism for ease of use. Technical specifications Material: 40CR Opening range: 7-43mm Three-sided tooth pattern for enhanced grip Usage Suitable for hexagonal nuts, pipe nuts, octagonal nuts, round pipes, and special-shaped screws Functions as a ring wrench, open-end wrench, adjustable wrench, socket wrench, pipe wrench, and water pump wrench Fast self-locking function for continuous and effortless operation