1.[Function]Self Adjusting Pipe , its built-in automatic locking spring, three-sided tooth design, firmly grips most types of fasteners, including hex head, head, star head and square head , and screws, even damaged fasteners. This is designed to provide maximum grip and torque, suitable for automotive, plumbing, carpentry, mechanical and plumbing work 2.[Opening Adjustment Range]6-inch 7-15mm, 8-inch 9-25mm, 10-inch 15-35mm, 12-inch 19-43mm. plumbers is easy to operate with one hand, and practical, and is widely used for pipes, screws, etc 3.[High-Quality Materials]The Universal Adjustable Pipe is from high-quality - alloy steel with a large opening and six adjustable positions. It is thickened, quenched and with a hardness of up to hrc60. , stable, , sturdy, durable and long life 4.[Strength]The double-threaded of the pipe vise have good -slip properties, and the special pliers allow the heavy duty pipe set to rotate backwards and reposition, making it -slip and quick to adjust