High durability: Made of chrome vanadium steel, it has strong strength and wear resistance, and is not easy to rust. Excellent features: It has 3 jaws that can clamp the filter more firmly for high efficiency. Adjustable jaws: The 3 jaws are adjustable, which can help adjust the clamp size for a wider fit, and the adjustment range is from 60 mm to 115 mm. Application: It is suitable for 1/2"/12.5 mm and 3/8"/10 mm square drives in cars.