The Metric Key Form A ZC Assortment of 25 pieces by G L Huyett is an essential kit for engineers and technicians. This assortment includes various sizes of Form A metric keys, made from zinc-coated steel for enhanced corrosion resistance. Each key is designed for secure fitment in keyways, ensuring reliable power transmission in machinery. The assortment provides versatility for different applications, making it a valuable addition to any workshop or maintenance kit. This product meets industry standards for quality and performance.