The Proto J5218H is a 3/8-inch drive, 9/16-inch 6-point socket built for professional-grade performance. Its 6-point design delivers superior grip on fastener flats, reducing the risk of rounding and providing more torque transfer during demanding applications.
Manufactured from high-quality materials to Proto's exacting standards, this socket is engineered for long-lasting durability in industrial, MRO, and professional trade environments. Compatible with all standard 3/8-inch drive Proto and equivalent ratchets and extensions.