1、Kit Contents: This maintenance screwdriver bit kit has one screwdriver handle, 1 cross bit 1x35mm, 1 cross bit 2x35mm, 1 cross bit 2x70mm, one 5x35mm bit, one 6x35mm bit, one 6x70mm bit. 2、High Hardness: The maintenance screwdriver bit kit is high hardness and stable when you are working with this kit. 3、Automatic Rotating: Hit the back of the screwdriver with a hammer(not including) and the front bit will rotate automatically. 4、Positive and Negative Rotation: The screwdriver can be adjusted the positive and negative rotation and can improve you efficiency. 5、Suitable Situations: This maintenance screwdriver bit kit can be easy to overcome stubborn screws and suitable for woodworking and home decorating. Item Type: Screwdriver Kit Material: 45 Steel Weight: Approx. 590g / 21oz Size: Approx. 16.5 x 5 x 3cm / 6.5 x 2 x 1.2in Use: Fastening screws 1 x Screwdriver Handle 1 x Cross Bit 1x35mm 1 x Cross Bit 2x35mm 1 x Cross Bit 2x70mm 1 x 5x35mm Bit 1 x 6x35mm Bit 1 x 6x70mm Bit