characteristic: Made of high quality metal, it has excellent hardness and durability. It has very high friction resistance, which improves the service life of the drill bit group and will not damage the screws. Each head group is designed accurately to ensure the cooperation and stability with various screws. All tools are packed in portable storage boxes, which are easy to carry and store. Used for electric screwdrivers, manual screwdrivers, electric drills, pneumatic tools and pneumatic drills. It is an Perfect repair tool for repairing household appliances, precision instruments and furniture. describe: Name: impact screwdriver set Material: Metal colour: Silver Package Contents: 1 x Impact screwdriver set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.