Heat-treated steel with a to prevent rust. Perfect for rusty nuts and bolts, this Hex Wrench Extender resists daily and tarnishing for long-lasting durability Fits most wrenches, hex keys, socket wrenches or pry bars etc. for turning 1/2inch wrench or torque wrench. and any other tools that work with 1/2inch drivers or 21 mm hex drivers. Hex wrench extensions time and effort. Great for adding more leverage to tough nuts and bolts and for into hard-to-reach areas., Weight: 0.61508971098 pounds, Manufacturer: Kueohse