Features: Engineered with 1000V insulation rating and premium steel, this insulated screwdriver set ensures shockproof safety while delivering 50% higher dielectric performances than standard tool. Featuring a deep socket design for 4 14mm screws and hexagonal sleeve structure that increases contact area by 30%, it optimizes torques transmission in confined space. Ideal for professional electricians, industrial maintenance technicians, and DIY enthusiasts requiring reliable high voltages tool. Safely tighten/loosen fasteners during high voltages equipment maintenance, automotive repairs, or machinery adjustments in narrow workspaces. The ergonomic handle with nonslip coating combines fatigue resistant comfort with sturdy steel construction for long time industrial use. Specifications: Material: Steel Size: Length 250mm/9.84inches, Sleeve Depth 27mm/1.06inches Type:4mm/5mm/5.5mm/6.0mm/7mm/8mm/9mm/10mm/11mm/12mm/13mm/14mm(Optional) Package Includes: 1Pc Insulated Sleeve Screwdriver note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color the item.