- Product standard: Insulated Single Box Offset Wrenches are IEC 60900 compliant and VDE certified. Before ex-works delivery, each tool passes a 10000 V AC test (10x rated voltage). - Durable and high quality: Die-forged from chrome-vanadium steel; nickel-plated surface; offset design for better access in tight spaces; rust-resistant; anti-burn; high and low temperature resistant; firm structure with no loosening, displacement, or shedding. - Applications: Widely used in power maintenance, power stations and transmission fields, precision instruments, power vessels, automatic switches, and other installation and maintenance operations, providing protection against electric shock. - Safety and ergonomic design: Insulated tools have a single-head structure with minimal exposed metal; flange on insulated handle; insulation is intact with no cracks or breaks; no joint gaps between assembled insulated tools; designed for manual mechanics and comfortable handling.