Gotd 3 in 1 Stainless Steel Screwdriver Precision Mini Screwdriver Keychain Flat Head Nut for Cell Phones, Watches, Sunglasses Eyeglass Repair Tool (Silver) Material: Aluminum steel 3-in-1 Accessory Tool: Flat head screwdriver / Phillips screwdriver / Star nut driver Used to repair or tighten up screws on variety eyeglasses, sunglasses, watches, cell phones With a keychain, portable and easy to carry Length without Keychain: Approx. 6cm. This product is very convenient and easy to use