15 VDE stainless steel interchangeable blades , mostly with reduced blade diameter, to reach and work even deep-set screws and spring elements. 2 hand holders 3817 VDE Kraftform for ergonomic work. Individually tested tool in accordance with IEC 60900. Individually tested at 10,000 V for safe working at the permissible voltage of 1,000 V. All Wera stainless steel tools are vacuum ice-hardened and therefore possess the required hardness and solidity for screwdriving work. Can be used industrially without restriction. The case can be attached to walls, shelves, tool trolleys and the Wera 2go system thanks to Velcro on the back.