11 点人机工程学程序设计三件式手柄 采用软质高摩擦材料，提供最大扭矩和舒适度 高级钒 表面经抛光和镀铬处理 硬度符合 DIN 和 ISO 标准 ### 独立式标准螺丝刀
The is a 222mm Screwdriver developed according to the scientific ERGO™ process. The blade is made of chrome-plated and entirely hardened high performance alloy steel and black finish tip for higher accuracy. It offers 3component handle for maximum user comfort and force transmission.