Features: Double Head Design:This wrench features a double ended design, with one end as a wrench for tightening nuts of different sizes, and the other end as an adjustable eyeglass wrench for conveniently adjusting the tightness of eyeglass screws. Self Tightening Function:Equipped with a self tightening function, this product automatically lock into place while rotating, ensuring a secure connection of screws and improving work efficiency and safety. Suitable for Eyeglass Users:Designed for people who wear glasses, this tool is perfect for adjusting the tightness of eyeglass screws, effectively solve the common problem of loose screws. Versatile Applications: for professionals in repair, assembly, and adjustment work, such as electronic device technicians and eyeglass repair shop assistants. It is also suitable for daily maintenance and repairs at home, office, and shops, including tightening eyeglass screws and repairing small appliances. Material:Made of chromium vanadium steel, this wrench is durable and corrosion resistant, ensuring long lasting stability and precise during use. Its ergonomic design provides a comfortable grip, making it even more stable and precise. Specifications: Material:Chrome Vanadium Size:Approx.16.51x3.81x0.41cm/6.5x1.5x0.16in Color:Black Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xTorx Wrench