Features: Multifunction wrench for CO2, oxygen, and argon gas cylinder valves, offering universal compatibility across multiple tank types. Crafted from 6mm thick 45# steel, this gas cylinder valves tool ensures exceptional durability and deformation resistance during high pressure operations. Ideal for HVAC technicians, welding professionals, and DIYer enthusiasts requiring reliable valves adjustment in industrial or home workshop environment. Perfect for emergency repairs, workshop maintenance, or outdoor projects with its 21cm lightweight design (200g) that fit effortlessly in tool belts and storage kit. Engineered with ergonomic nonslip grips, this professional wrench delivers secure handling during critical gas system operations. Specifications: Component:45# steel Size: 21cm, thickness 6mm Weight: about 200g Package Includes: 1pcs Gas Cylinder Wrench note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.