These insulated hexagonal sockets from Kennedy feature a 3/8in. square drive and are designed for safety and durability in live working environments. Made from robust chrome vanadium steel with dual-layer insulation, they provide protection against voltages up to 1000V. Available in metric sizes from 4mm to 10mm, each socket meets IEC 60900 standards and is clearly marked for fast identification. Features and Benefits 3/8 inch square drive for medium-duty applications Socket size range 4mm to 10mm in metric sizing Hexagonal socket type for precise fastener engagement Chrome vanadium steel construction for long-lasting strength Dual-layer insulation offers electrical protection up to 1000 volts Printed size markings for quick and easy identification Standards Complies with IEC 60900 for safe electrical work