Sufficient screwdriver kit:There are extra alternative blades of each size for you to replace the screwdriver in case of losing or not working, as as a mini screwdriver to carry with you, which can satisfy your demands on dealing with emergencies of fixing eyeglasses or watches. Thoughtful presents of watch makers screwdriver set:The electric screwdriver are practical for mechanics, proper for sending to your father, , neighbors and watch repairman, proving an effective way to repair or fix, saving their time and energy at work. Size: Length: about 8.8 x 0.8 cm/ 3.46 x 0.32 inch Flat head: 0.6 mm/ 0.024 inch, 0.8 mm/ 0.032 inch, 1.0 mm/ 0.039 inch, 1.2 mm/ 0.047 inch, 1.4 mm/ 0.055 inch, 1.6 mm/ 0.063 inch, 1.8 mm/ 0.071 inch, 2.0 mm/ 0.079 inch head: 1.2 mm/ 0.047 inch, 1.4 mm/ 0.055 inch, 1.6 mm/ 0.063 inch, 1.8 mm/ 0.071 inch, 2.0 mm/ 0.079 inch Colour:silver Material:tool steel Package Contents: 13 x Mini jewelry screwdrivers 13 x Replacement blades 1 x Demagnetizer 1 x screwdriver Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.