This 13-piece insulated screwdriver set is designed for professional electrical work, featuring VDE-certified screwdriver shafts and a GS-certified voltage tester. Made from 6150CRV steel with a hardness of HRC 52±2, the set includes slotted, Phillips, Pozidriv, and Torx heads for versatile applications. The ergonomic handle and insulated design ensure safety and comfort, making it ideal for wholesale distribution to electrical contractors and hardware suppliers.