Watch Replacement Screws Assortment High precision and standart professional screws. Environmetal Stainless steel, durable and antirust. Suitable for many brand names. Watch Screws with thread diameters 1, 1.2, and 1.4 mm and head diameter 1.2, 1.4, 1.5, 1.6, 1.8, 2.0& 2.5 mm in lengths from 1.5 to 3.0 millimeters. A total of 360 pieces, 20 each of 18 different screws. All Screw have slotted Heads.