4mm - Insulated hex key

These professional-grade VDE-Insulated Hex Keys provide safe, precise control when tightening or loosening hex fasteners on live electrical equipment. The L-shaped design delivers excellent leverage and access in confined spaces, while precision-ground tips ensure an exact fit in hex socket screws to prevent damage or rounding. Built from hardened steel with durable VDE insulation, these hex keys combine electrical safety, long service life, and ergonomic comfort. Whether used individually or as part of a full set, they are ideal for electrical panels, control cabinets, and other live circuit applications.