The screwdriver rod is made from high chrome molybdenum steel and through hardening and black finish; - High frequency quenching of the cutting tools with strong magnetic can absorb screws at work easy operation; - Handle the anti-static materials non-slip handle PP & TPR material design non-slip handle can play a maximum torque; - Heat treatment: Heat treatment technology controlled by computer thus ensuring the stability of hardness; - Features: Fine workmanship good quality and hardness of the cutting tools knife type of high precision in use process is not easy to deformation and broken.