Foxnovo Stainless Steel Clock Watch Eyeglasses Screws Professional Repair Tools - 670pcs 670 pieces of the stainless steel clock watch screws in 10 different sizes in one set will be sold together. Material: durable stainless steel. Each screw diameter: about 1.2mm. 10 different sizes (Screw length): 1.6mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm. These quality screws are an extremely handy accessory to your tool kit. Can be used for repairing your watches, clock and even eyeglasses. Keeping those 10 different-sized screws in a transparent plastic box case, for easy to access.