1/2 inch drive compatibility This spud wrench features a 1/2' drive and fits standard 1/2' drive ratchets, power bars, and extensions, making it a practical addition to any toolbox. Precision for radiator valves Ideal for servicing most household radiator valves, it provides accurate tightening or loosening without damaging delicate nipples. The pipe wrench style grip helps apply controlled force where precision is important. Multisize capability Equipped with five hex sizes, this wrench covers a wide range of valve trails, lugs, nipples, and tank connectors, reducing the need to carry multiple tools. Durability and rust resistance Constructed from chrome vanadium steel and finished with a satin coat to resist rust, this wrench is built for long lasting performance. Why this tool stands out Reduces tool clutter and cost by covering multiple sizes and applications in one tool Protects delicate components while delivering reliable torque Designed for dependable, long term use in common radiator and plumbing tasks Applications and use scenarios Servicing household radiator valves during routine maintenance or replacement, tightening or loosening nipples with care Working on radiator valve nipples, lugs, and tank connectors in heating system installations or repairs Use in confined spaces where a standard 1/2' drive tool is required to reach fittings without risking damage to components